AD 81-03-05

final rule
Data completeness: 70%

AVCO LYCOMING Model IGSO-480-A1E6; IO-540-A1A5; IO-540-B1C5; IO-540-K1E5; IGO-540-A1A; IGO-540-A1A, -B1A, - B1C; IGSO-540-A1A, -A1C, -A1D, -A1E, -A1H Engines

AD Number
81-03-05
Status
final_rule
Effective Date
Product Category
engine
Docket
Unknown
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
engine Lycoming Engines IGO-540-A1A AVCO LYCOMING Model IGSO-480-A1E6; IO-540-A1A5; IO-540-B1C5; IO-540-K1E5; IGO-540-A1A; IGO-540-A1A, -B1A, - B1C; IGSO-540-A1A, -A1C, -A1D, -A1E, -A1H Engines
engine Lycoming Engines IGO-540-B1A AVCO LYCOMING Model IGSO-480-A1E6; IO-540-A1A5; IO-540-B1C5; IO-540-K1E5; IGO-540-A1A; IGO-540-A1A, -B1A, - B1C; IGSO-540-A1A, -A1C, -A1D, -A1E, -A1H Engines
engine Lycoming Engines IGO-540-B1C AVCO LYCOMING Model IGSO-480-A1E6; IO-540-A1A5; IO-540-B1C5; IO-540-K1E5; IGO-540-A1A; IGO-540-A1A, -B1A, - B1C; IGSO-540-A1A, -A1C, -A1D, -A1E, -A1H Engines
engine Lycoming Engines IGSO-480-A1E6 AVCO LYCOMING Model IGSO-480-A1E6; IO-540-A1A5; IO-540-B1C5; IO-540-K1E5; IGO-540-A1A; IGO-540-A1A, -B1A, - B1C; IGSO-540-A1A, -A1C, -A1D, -A1E, -A1H Engines
engine Lycoming Engines IGSO-540-A1A AVCO LYCOMING Model IGSO-480-A1E6; IO-540-A1A5; IO-540-B1C5; IO-540-K1E5; IGO-540-A1A; IGO-540-A1A, -B1A, - B1C; IGSO-540-A1A, -A1C, -A1D, -A1E, -A1H Engines
engine Lycoming Engines IGSO-540-A1C AVCO LYCOMING Model IGSO-480-A1E6; IO-540-A1A5; IO-540-B1C5; IO-540-K1E5; IGO-540-A1A; IGO-540-A1A, -B1A, - B1C; IGSO-540-A1A, -A1C, -A1D, -A1E, -A1H Engines
engine Lycoming Engines IGSO-540-A1D AVCO LYCOMING Model IGSO-480-A1E6; IO-540-A1A5; IO-540-B1C5; IO-540-K1E5; IGO-540-A1A; IGO-540-A1A, -B1A, - B1C; IGSO-540-A1A, -A1C, -A1D, -A1E, -A1H Engines
engine Lycoming Engines IGSO-540-A1E AVCO LYCOMING Model IGSO-480-A1E6; IO-540-A1A5; IO-540-B1C5; IO-540-K1E5; IGO-540-A1A; IGO-540-A1A, -B1A, - B1C; IGSO-540-A1A, -A1C, -A1D, -A1E, -A1H Engines
engine Lycoming Engines IGSO-540-A1H AVCO LYCOMING Model IGSO-480-A1E6; IO-540-A1A5; IO-540-B1C5; IO-540-K1E5; IGO-540-A1A; IGO-540-A1A, -B1A, - B1C; IGSO-540-A1A, -A1C, -A1D, -A1E, -A1H Engines
engine Lycoming Engines IO-540-A1A5 AVCO LYCOMING Model IGSO-480-A1E6; IO-540-A1A5; IO-540-B1C5; IO-540-K1E5; IGO-540-A1A; IGO-540-A1A, -B1A, - B1C; IGSO-540-A1A, -A1C, -A1D, -A1E, -A1H Engines

Unsafe Condition

Fuel leakage in the mixture control shaft assembly on Bendix Model RS-10FB1, RS-10ED1, RS-10ED2, RS-10B1 and RS-10B2 fuel injectors.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Modify the mixture control shaft assembly with new parts per Bendix Service Bulletin RS-62, Rev. 1, dated 2/14/80, or FAA approved equivalent. Reidentify all modified fuel injectors per the Service Bulletin instructions. Equivalent methods require approval by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

within the next 50 hours' in service after the effective date of this AD, unless already accomplished

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

AVCO Lycoming engines: IGSO-480-A1E6 (S/Ns up to L-2066-44); IO-540-A1A5 (S/Ns up to L-19212-48); IO-540-B1C5 (S/Ns up to L-9631-48); IO-540-K1E5 (S/Ns up to L-19698-48A); IGO-540-A1A, -B1A, -B1C (S/Ns up to L-339-49); IGSO-540-A1A, -A1C, -A1D, -A1E, -A1H (S/Ns up to L-3637-50)

AI-generated summary from the source AD text. Verify against the official source before acting.

Source: Official FAA Source ↗

Retrieved: Apr 8, 2026

Rights: U.S. Government Public Domain

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