81-03-05: Mixture Control Shaft Assembly
FAA order 81-03-05 is an airworthiness directive in force since February 11, 1981. The FAA's subject line: Mixture Control Shaft Assembly. It names the Lycoming IGO-540-B1A, Lycoming IGSO-480-A1E6, Lycoming IGSO-540-B1A, Lycoming IO-540-A1A5, Lycoming IO-540-K1E5, Lycoming IO-540 series engines: about 4,297 aircraft on the U.S. register today across them, though an order usually covers particular versions or serial numbers rather than every one. System: engine.
What it applies to as the FAA lists it
- Kind of product
- Engine
- Makes
- Lycoming Engines
- Models
- IGO-540-A1A, IGO-540-B1A, IGO-540-B1C, IGSO-480-A1E6, IGSO-540-A1A, IGSO-540-A1C, IGSO-540-A1D, IGSO-540-A1E, IGSO-540-A1H, IO-540-A1A5, IO-540-B1C5, IO-540-K1E5
- Engine series
- Lycoming IGO-540-B1A 9 aircraft
Lycoming IGSO-480-A1E6 1 aircraft
Lycoming IGSO-540-B1A 48 aircraft
Lycoming IO-540-A1A5 16 aircraft
Lycoming IO-540-K1E5 5 aircraft
Lycoming IO-540 series 4,218 aircraft
Dates and paperwork
- In force since
- February 11, 1981
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (1,502 characters)
81-03-05 AVCO LYCOMING: Amendment 39-4038. Applies to all IGSO-480-A1E6 with S/Ns up to and including L-2066-44; IO-540-A1A5 with S/Ns up to and including L-19212-48; IO-540-B1C5 with S/Ns up to and including L-9631-48; IO-540-K1E5 with S/Ns up to and including L-19698-48A; IGO-540-A1A, -B1A, - B1C with S/Ns up to and including L-339-49; IGSO-540-A1A, -A1C, -A1D, -A1E, -A1H with S/Ns up to and including L-3637-50.
Compliance required within the next 50 hours' in service after the effective date of this AD, unless already accomplished.
To prevent fuel leakage in the mixture control shaft assembly on Bendix Model RS-10FB1, RS-10ED1, RS-10ED2, RS-10B1 and RS-10B2 fuel injectors, accomplish the following:
a. Modify the mixture control shaft assembly with new parts in accordance with Bendix Service Bulletin RS-62, Rev. 1, dated 2/14/80, or FAA approved equivalent.
b. All modified fuel injectors must be reidentified in accordance with instructions noted in the above Service Bulletin.
Equivalent methods of compliance must be approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration (FAA) Eastern Region.
Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, The Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, may adjust the compliance time specified in this AD.
Lycoming Service Bulletin No. 444 also pertains to this subject.
This amendment is effective February 11, 1981.
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of October 5, 2026. Connections as data: /graph/directive/81-03-05.json · aircraft systems.