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AD 81-18-04 R2

Historical
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Airworthiness directive · Engine Oil Pump Driven Impeller and Shaft · Textron Lycoming, AVCO AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 376 more

FAA copy· on FAA DRS
AboutSource files 1
Effective
June 7, 1982
Superseded by
AD96-09-10
Models
AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A, AEIO-320-E1B, AEIO-320-E2A, AEIO-320-E2B and 373 more
Data sheets
TCDS1E10TCDSE-286TCDSE-2749 more
Registered aircraft
81,686 matched by model
Product
Engine
Amendment
39-4395

Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed August 7, 2025.

On this page

Affected TCDS · 12

The type certificate data sheets for the models this AD names, matched by model and maker.

TCDS 1E10Lycoming EnginesNames 80 of 89 models: IO-360-C1D6, AEIO-360-B1G6, HIO-360-B1B and 77 moreTCDS E-286Lycoming EnginesNames 70 of 72 models: LO-360-A1H6, O-360-C1C, O-360-C1A and 67 moreTCDS E-274Lycoming EnginesNames 58 of 60 models: O-320-H3BD, O-320-D2G, O-320-E2G and 55 moreTCDS 1E4Lycoming EnginesNames 45 of 81 models: IO-540-L1C5, IO-540-A1A5, IO-540-AA1B5 and 42 moreTCDS E-223Lycoming EnginesNames 40 of 43 models: O-235-K2C, O-235-M3C, O-235-A and 37 moreTCDS 1E12Lycoming EnginesNames all 32 models: AEIO-320-E1B, AEIO-320-D2B, AIO-320-C1B and 29 moreTCDS E-295Lycoming EnginesNames 31 of 47 models: O-540-B2C5, O-540-B1D5, O-540-G2A5 and 28 moreTCDS E-229Lycoming Division AVCO CorporationNames 5 of 10 models: O-290-D2, O-290-D, O-290-D2A and 2 moreTCDS 1E1Lycoming EnginesNames all 4 models: IVO-360-A1A, VO-360-A1A, VO-360-B1A and VO-360-A1BTCDS E16EALycoming EnginesNames all 4 models: TIO-360-A1B, TIO-360-A1A, TIO-360-C1A6D and TIO-360-A3B6TCDS E26EALycoming EnginesNames 4 of 6 models: TO-360-C1A6D, TO-360-A1A6D, LTO-360-A1A6D and TO-360-F1A6DTCDS E-277Lycoming EnginesNames all 3 models: O-340-A2A, O-340-B1A and O-340-A1A

Registered aircraft · 81,686

Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.

By aircraft maker
  • Piper32,029
  • Cessna19,118
  • Mooney3,618
  • Beech1,771
  • Bellanca1,693
  • Other makers10,09323,457
By year built
19102026

10,083 with no year recorded

By model

See all 278 models

Aircraft

N1000PJames Bond Aviation LLC · Belgrade, MNBuilt 1963 · S/N 28-1000N1000SButler County Warbirds Inc · Middletown, OHBuilt 1972 · S/N AA5-0107N1001A1st Avenue Ttc LLC · Los Angeles, CAS/N CG3
See all 81,686 aircraft

NTSB investigations that cite this AD · 2

Their narratives or probable cause name AD 81-18-04, often to say whether the aircraft complied with it.

NTSB NYC96LA117Accident · Minor injuriesLimited investigationFinal reportCessna 177B · Chatham, MAfailure of the oil pump, which resulted in oil starvation and subsequent failure of the number two and four cylinder connecting rods. Also causal was inadequate maintenance by noncompliance with the airworthiness directive that required replacement of the oil…May 28, 1996 · N19708 · Substantial damageNTSB ATL82DA181Accident · No injuriesFinal reportCessna 172 · Martinsburg, WVShortly after level-off to cruise, the engine began to lose power. The pilot attempted to restore the power, but the engine RPM continued to decrease. A turn was made back toward the airport. While scanning the instruments, zero oil pressure and a high oil…Jun 30, 1982 · N61791 · Substantial damage