What exactly is a Safety Performance Indicator (SPI) and how do they help enhance safety? In a nutshell, an SPI can make a Safety Manager’s job easier, because it is a safety parameter that measures levels of safety performance achieved. SPIs often analyze the frequency of occurrence of a given event.

Author: Allison Barber
MEL, MMEL, NEF: What Are You Required to Have? [+ Free MEL Guide]
Are you required to have an MEL? Could your aircraft be grounded if you don’t have an NEF Program? MMELs, MELs, and NEFs (nonessential equipment and furnishing lists) allow you to operate even if some aircraft equipment and furnishings are inoperative. Knowing which you need though can be confusing.
Did you know that the use of an MMEL as an MEL requires more than simply having the MMEL? Find out what other documents you need to have on board the aircraft. Download our free MEL guide for clear guidance on what you need, how to use it, and how to maintain it.
MMEL Explained
Master Minimum Equipment List (MMEL): A master list of items on an aircraft that are allowed to be inoperative under specific conditions without impacting the safety of flight.
The MMEL is established by the aircraft manufacturer and approved by the national aviation authority. The goal of the document is to detail what equipment and furnishings can be inoperative without compromising safe operations. When developing the MMEL a number of factors are taken into consideration including:
- Engineering and flight testing of failures
- Effects of inoperative items on flight safety and the crew
- Impact of multiple failures
MEL Explained
Minimum Equipment List (MEL): Based on the MMEL, it is an adapted list of items specific to a given aircraft/fleet aircraft that may be inoperative taking into consideration specific regulatory and operations limitations unique to each operator.
With an MEL, the operator can far more easily determine the conditions under which an aircraft can operate even with inoperative equipment, since it is more concise and customized to the aircraft/fleet and operator.
An MEL must also be approved by the aviation authority, but unlike an MMEL, which is designed to cover an entire aircraft series/models’ potential configurations, spanning years or even decades, an MEL can be fully customized to remove non-applicable items as well as add procedures.
MEL customization is based on:
- Aircraft type, variant, and serial number
- Applicable regulations related to the type of operation, aircraft size and capacity, airworthiness directives, MMEL supplements, STCs, etc.; and special approvals granted to the operator (CAT II, PBN, RVSM, ETOPS…).
It is important to ensure that when customizing an MEL, it is never less restrictive than the MMEL.
What about nonessential equipment that cater to passenger convenience and entertainment? These are part of an Operator’s NEF Program instead.
NEF Explained
Nonessential Equipment and Furnishings Program (NEF): It is part of the MEL, but may be kept as a separate document. It outlines the steps operators may use to determine if a damaged, inoperative or missing item can be deemed as nonessential and therefore deferred.
If you have the LOA that allows you to use your MEL, or MMEL as an MEL for U.S. Part 91 operators, you may use an NEF Program to defer items deemed nonessential.
However, if you don’t have an NEF program, all inoperative, nonessential items need to be fixed before takeoff.
U.S. registered aircraft operating under Part 91 can obtain authorization to use the MMEL as an MEL, although it’s highly suggested that operators use this for domestic operations only.
MMEL as MEL (U.S. Registered, Part 91 Only)
If you want to use an MMEL as an MEL, there are however other documents you must have onboard in addition to the MMEL – refer to the MEL Guide for more information.
When using an MMEL as an MEL crews only have generic information available to them. Not all items included in the MMEL will be applicable to their specific aircraft or type of operation. It is important that crews be able to determine which deferrals are applicable to them.
- A number of items in the MMEL will not indicate a specific number installed or number required. Crews will need to know which equipment is installed, how many units are installed, and the minimum number required based on applicable regulations and operational limitations.
- The MMEL and M&O procedures will contain generic procedure statements. Crews will need separate guidance on where specific procedures can be found.
- The MMEL will contain generic regulatory statements. Crews will need to know which regulations apply to each item and have copies of those regulations available to them in the aircraft.
Due to the generic nature of the MMEL, crews must be careful when selecting the appropriate deferral item. Some of the things they will want to consider are:
- Modifications, Service Bulletins, STCs, etc.
- Part numbers
- Serial number ranges
- Variant restrictions
- Operating types
- Installations of other equipment
- Quantity of equipment installed
Creating an MEL that meets regulations and then keeping it up to date is very time consuming. Contact our team for advice and support. And don’t forget to download your complimentary MEL Guide:
The Most Common Risks Operators Face Day to Day
Quick, accurate risk identification is essential for a successful operation. While some risks may be specific to a location, flight path, or aircraft, there are many that occur regularly and can be planned for ahead of time.
Through ARCrisk, ARC’s digital Risk Assessment Tool, flight departments log thousands of risk assessments every year. We’ve taken a look at the top 10 selected risk factors flight departments are facing and how to mitigate them. How do these compare to your top 10 factors and subsequent mitigations?
Flight Planning Codes Demystified [+ Free Guide]
AviationManuals updates international operations service to conform with new flight planning codes
At AviationManuals a primary element of our services is ensuring our clients have the most up-to-date information about regulations, compliance, and requirements.
This month we’re announcing updates we made to our international operations procedures service in response to the new planning code requirements that were released by the Federal Aviation Administration (FAA) in November 2022.
The FAA had identified potential gaps in the codes currently available in the international flight plan format that can result in ambiguity on specific advanced navigation capabilities. To improve understanding between operators and ATS, the FAA has introduced new codes for any aircraft that intends to use these capabilities.
For example, the new codes allow operators to indicate if an aircraft is fitted with advanced RNP and related capabilities such as Radius to Fix (RF) or Time of Arrival Control (TOAC), as well as RNP-2 in either continental or oceanic airspace.
These new codes will be required for any aircraft that intends to use these capabilities within FAA- controlled airspace and are effective immediately.
In response, we have updated our international operation procedures (IOP) services to reflect the new requirements and codes. Subscribed operators have received a Sky Brief update about the change and will see the new procedures updated in their manuals at their next annual revision. This is just one of the hundreds of requirements we monitor and review across multiple regulatory environments to ensure our clients always have the most relevant and timely information at their fingertips.
AviationManuals Receives MEL Preamble Pre-Approval from Isle of Man: What it means for you
You probably think our business is safety.
And it is. But we are also so much more than that.
We spend much of our time working with agencies, partners, and industry leaders to provide the best possible outcomes for operators, particularly when navigating complex compliance and safety landscapes.
We recently announced that the Isle of Man granted “pre-approval of our Minimum Equipment List preamble,” and you can read about it here:
- AIN: Isle of Man Approves AviationManuals’ MEL Preamble
- AviationPros: AviationManuals Grows Partnerships Expanding Service Offerings and Convenience to Clients
We are proud of the Isle of Man announcement since it reflects the high standards the entire team at AviationManuals always strives for. We want to continue to be the trusted partner that helps make running an operation easier for our clients.
Developing strong relationships and partnerships with regulators worldwide as well as strategic associations in business aviation, has been instrumental in helping to streamline approvals and applications.
So, even if your aircraft is not registered with the Isle of Man, this achievement demonstrates how we continually strive to make all our services more accessible and valuable to our customers.
While we continue to talk to companies across the industry about integrations, you can always stay up to date on our latest partnerships and integrations here. Alternatively, feel free always to reach out and tell us directly what partnerships or integrations you might like to see us pursue.
One partner, association, authority, and application at a time, we’re building the future of safety and compliance support.
Did you miss BACE? Here is what we found interesting
During NBAA-BACE last month, the AviationManuals team had the opportunity to meet clients and industry colleagues, attend educational sessions, and present to attendees with the FAA and Honeywell. Here are some takeaways from the event that our team thought was important.
LOA Streamline Process
There was a lot of interest at the event about the new FAA LOA Streamline Process that launched earlier this year. The simplified application process for Part 91 operators with new aircraft uses FAA-issued statements of compliance (SOC), which indicate the FAA has previously reviewed and approved the applicable documentation from the holding vendor. As a result, inspectors can approve LOA applications without a full review of all documentation, thereby shortening approval time from months to weeks.
Workforce Challenges
Workforce challenges were another main discussion point during BACE this year. From ground personnel to pilots, the whole industry is facing a shortage and is trying to navigate the best way to recover. As flight departments experience personnel changes, utilizing procedures manuals to ensure smooth transitions and SMS to monitor risks associated with change is more important than ever.
Our CEO, Mark Baier, talked about the subject with Fast Company in the summer. Learn more here: Why is there an airline pilot shortage?
In addition, mental health was a newer topic that we were glad to see being discussed. We hope that sessions covering mental health and strategies to support employees’ overall wellness continue.
SMS Challenges
A subject in the show’s past editions, the SMS challenge continued to be a hot topic this year. With the expectation that the FAA will soon make it mandatory for Part 135 and SMS being on the NTSB’s Most Wanted List, operators had many questions about it. After working with hundreds of operators, we’ve created a practical SMS Guide to help you implement or improve SMS within your own department.
Sustainability
Another relevant talking point was sustainability. During the Newsmakers breakfast, Boeing Chief Strategy Officer Marc Allen answered questions about how to move forward in a more sustainable way and discussed the idea of “zero-impact over zero-emissions.” There were also sessions about Sustainable Aviation Fuel (SAF), climate risk, and the importance of environmental sustainability for the business aviation industry
What we were up to
Our team had packed schedules for the event showing the industry the upcoming features and integrations for ARCrisk and working with the FAA and Honeywell to speak about the latest updates operators need to know for international travel and how to navigate ramp inspections.
Did we miss you at the show? We would love to meet, answer any questions you have, and understand how we can assist you further.
Telephone: +1 (240) 546-4030
Email: info@aviationmanuals.com
Partnerships and Integrations Bring Improved Safety and Compliance Services
AviationManuals has partnered with industry leaders and aviation authorities to streamline your safety and compliance experience with access to additional services, features, and reduced processing times for approvals.
As part of our mission to provide operators with the only integrated approach for SMS, compliance, and procedures all in one platform we have developed strong working relationships, partnerships, and integrations with numerous support service vendors including flight planning services, avionics manufacturers, and maintenance facilities. All of these will allow us to better serve clients by offering reduced operator workload, easier reviews, and minimal aircraft downtime.
Partnerships and Integrations include:
- Bermuda Civil Aviation Authority (BCAA)
- ARINCDirect / Collins Aerospace
- Universal UVGo
- Scott IPC
- Starr Insurance Companies
- Isle of Man Aircraft Registry (IOMAR)
Check out our Partnerships and Integrations page for a full list of details.
These established partnerships are just one more way we extend industry knowledge and convenience to our customers. Our team is continuing to work on the development of key partnerships and integrations so that we can introduce even more improvements to work flows and special services and events.
Join the VIP of Safety
If you are a business aviation flight department, FBO, or commercial drone operation that needs a better way to do business, let’s talk!
AviationManuals Earns IS-BAH PSA Recognition
AviationManuals broadens its long-standing relationship with IBAC by expanding support for FBOs seeking IS-BAH certification.
ROCKVILLE, MD, August 23, 2022 – AviationManuals, the leading provider of procedure development services and Safety Management System (SMS) software, has received IS-BAH (International Standard for Business Aircraft Handling) PSA (Programme Support Affiliate) recognition. By becoming a PSA, AviationManuals has expanded its support solutions for FBOs to include those who wish to meet the IS-BAH standard or seek IS-BAH certification.
“FBOs are busy managing their own businesses and may have limited resources for figuring out SMS on their own,” said Mark Baier, CEO of AviationManuals. “ Many operators can benefit from our assistance to get them prepared for IS-BAH certification,” Baier said.
“While we have always helped FBOs with compliance and safety, we can now also support operators as a recognized PSA with IBAC,” said Kevin Honan, Senior Operations Advisor at AviationManuals. “We can assist FBOs in understanding, complying with, and maintaining the standards of the IS-BAH Program.”
Developed by the International Business Aviation Council (IBAC) in 2014, the IS-BAH standard uses SMS to help FBOs manage workplace safety and prevent aircraft handling incidents and workplace injuries.
“IS-BAH certification is quickly becoming a popular way for FBOs to demonstrate their quality and professionalism,” continued Baier. “We want to support our clients looking to achieve this endorsement by providing them with our years of extensive operational support and SMS experience.”
About AviationManuals: Founded in 1996 AviationManuals’ philosophy is to make operations manuals and Safety Management Systems (SMS) accessible to every business aviation flight department, FBO and commercial drone operation. Headquartered in the Washington DC metro area, they support over 4,500 operators worldwide and are the leading provider of manual development services and Safety Management System (SMS) software for business aviation flight departments, aircraft management companies, and independent owner / operators around the globe. For more information visit www.aviationmanuals.com
Updated EU Ramp Inspection Program (SAFA) Service Offerings
Our popular SAFA Inspection Manual Service has been updated to conform with the latest guidance released by the European Union Aviation Safety Agency (EASA). As the Ramp Inspection Program expands, more operators are concerned about being prepared for an inspection, leading to an increase in customers getting SAFA Inspection Manuals. In the first half of 2022 we prepared almost the same number of SAFA Inspection Manuals as we did in all of 2021.
Updates
The updated Ramp Inspection Manual (RIM) Issue 3.0 from EASA does not require you to make changes to your flight department operations. Rather, it expands the guidance for inspectors performing checks clarifying differences for general aviation operators vs commercial. Additionally, the revisions give more information about items to be reviewed and pre-described findings.
Staying up to date is a vital part of safety. We have incorporated these changes, which in this case, will benefit both operators and inspectors in ensuring ramp checks continue to go smoothly.
EU Ramp Inspection Program
The program is utilized inside and outside of the EU and regulates the SAFA and SACA Inspections performed on aircraft to help facilitate safety and compliance. This includes checks on items such as pilot licenses, procedures, safety equipment, and aircraft condition.
These inspections may be performed in any EU Member State. They may also be initiated in non-EU Member States that are participating in the program, including Canada, Singapore, and most recently Brazil.
Ramp inspectors may check a list of over 50 items. Having an easy-to-navigate digital “binder” that address each item with evidence makes it quick to identify and locate compliance items. Additionally, it can help you to identify any areas of non-compliance prior to traveling to a participating State.
Interested in our SAFA Inspection Manual service? Request a quote.