Are All Service Bulletins Mandatory?


Every mechanic, repair station, and FBO has run up against the mandatory service bulletin question, “Do service bulletins apply or not?” To its credit the FAA has not wavered and has stated over the last 30 plus years that service bulletins are not mandatory.

What is Mandatory Service Bulletin?

Mandatory Service Bulletin means any service bulletin affecting the airworthiness or safety of the Aircraft which is issued by the Manufacturer and compliance with which is required within a defined period of time.

Are aircraft manufacturer service bulletins mandatory?

Service bulletins are considered advisory, not mandatory, for Part 91 operators.” If the NTSB interpretation stands, the cost to aircraft owners could be substantial. That’s because there are usually more SBs issued by the manufacturer than ADs approved by the FAA.

Under what condition are all aircraft required to be in compliance with a manufacturer’s mandatory service action?

Under what conditions are all aircraft required to be in compliance with a manufacturer’s mandatory service action? when the service action is required as prescribed in an AD. (Chp 4) list three possible sources where a checklist may be acquired or designed for performing an inspection.

What is a service bulletin FAA?

Service Bulletins (SB) are notices to aircraft operators from a manufacturer notifying them of a product improvement. Alert service bulletins are issued by the manufacturer when a condition exists that the manufacturer feels is a safety related item as opposed to just a product improvement.

What is the difference between a service bulletin and a service letter?

A Service Letter is normally used to pass information along to the industry from the manufacturer and are not mandatory. Service Bulletins are highlighting more important service difficulties found in the field.

Is a service bulletin the same as a recall?

These bulletins differ from recalls in that they are not considered safety or emissions issues and they usually apply only when your vehicle is in its warranty period (whereas a recall is “open” until the work has been performed).

What are the types of service bulletin?

Service Bulletins (SB)

Having realized that there were distinct levels of seriousness to a service bulletin, manufacturers started to categorize them as optional, recommended, alert, mandatory, informational, etc.

Why service bulletins are issued in inspection process?

What is the purpose behind releasing SB? The purpose of SB is to communicate with operators for details of modifications, new product release which can be embodied in aircraft. Service Bulletin SB may issue by the manufacturer to: Fix safety issue (Mandatory & Alert SB)

What are the 3 types of Airworthiness Directives?

What types of Airworthiness Directives ( ADs ) are issued?

  • Notice of Proposed Rulemaking ( NPRM ), followed by a Final Rule.
  • Final Rule; Request for Comments.
  • Emergency ADs.

What is the purpose of service bulletin?

Definition. A Service Bulletin is the document used by manufacturers of aircraft, their engines or their components to communicate details of modifications which can be embodied in aircraft.

Where can I find aviation service bulletins?

To locate, view, and download individual bulletins, search the SAIB database in the FAA Regulatory and Guidance Library. For more information on SAIBs, contact the Delegation Procedures Branch.


WHO issues airworthiness directives?

Airworthiness Directives ( AD s) are legally enforceable regulations issued by the FAA in accordance with 14 CFR part 39 to correct an unsafe condition in a product. Part 39 defines a product as an aircraft, engine, propeller, or appliance.

What is a service letter in aviation?

Service Information Letter (SIL) is used to transmit information, recommendations, and general service instructions to the aircraft owner/operator and maintenance personnel. The information provided in the SILs will be incorporated into the maintenance manual as needed at a later date.

How long do service bulletins last?

A recall is a mandatory repair; automatically applicable to the YMM and VIN; paid for by the automaker, and it never expires. A TSB is a voluntary repair and may not be applicable if you’re not experiencing the problem it covers.

Does a service bulletin mean free repair?

Technical Service Bulletins are issued by manufacturers when there is a problem found in a number of cars which does not have an obvious fix. The TSB is a guide for mechanics to fix the problem but it is not a free fix by itself.

When would a service campaign be conducted?

Service campaigns often cover widespread problems that occur after the warranty expires.

What is the function of service letters and bulletins?

Service letters are used to provide notification of upcoming changes to production aircraft, including the availability of a Boeing service bulletin or a supplier service bulletin for fleet retrofit/modification. Additionally, service letters are used to provide information related to new or preferred spares options.

What service letter means?

Service certificate: Service certificate or certificate of service is the written document provided by the company/employer at the time of the termination or separation this document contains statement testifying employee service and reference.

What is service instruction?

Service Instructions means any instruction or communication by Customer that covers or relates to any of the Services being provided.

How do you find a service bulletin?

In search of service bulletins

  1. Go to the National Highway Traffic Safety Administration website. …
  2. Enter the year, make and model of your car, truck or van. …
  3. Note exactly when your vehicle was made, which you can find from a sticker on the driver’s door frame or door edge.

What is a kinds of operations equipment list?

As the name implies, the Kinds of Operations Equipment List (KOEL) is a list of equipment installed in an aircraft that specifies for which kinds of operations a specific piece of equipment is required. The KOEL is used as part of the process of determining if an aircraft with inoperative equipment is airworthy.

Which is the most expensive maintenance check of all?

7. Which is the most expensive maintenance check of all? Explanation: D-check is the most expensive maintenance check to be performed on an aircraft. This is due to the large amount of manpower and equipment required to conduct a D-check.