# AD 84-13-05: Redesigned Crankshaft - Type: Airworthiness directive - Status: Current - Products: Lycoming Engines AEIO-360-A1A, AEIO-360-A1B, AEIO-360-A1B6, AEIO-360-A1C, AEIO-360-A1D, AEIO-360-A1E, AEIO-360-A2A, AEIO-360-A2B, AEIO-360-A2C, AEIO-360-B1B, AEIO-360-B1D, AEIO-360-B1F and 10 more - Effective: July 16, 1984 - Superseded by: Nothing supersedes this AD - Product type: Engine - Amendment: 39-4886 - Registered aircraft: 952 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FC4AEDBBC1804D8B862568420057A96E.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/84-13-05 ## The airworthiness directive 84-13-05 AVCO LYCOMING: Amendment 39-4886. Applies to engine models AIO-360-A1A, -A2A, -A1B, -A2B, -B1B, all with serial numbers up to and including L-257-63A, engine models AEIO-360-A1A, -A1B, -A1B6, -A2A, -A1C, -A2C, -A1D, -A1E, -A2B, -B1B, -B1D, -B1F, -B1F6, -B2F, -B2F6, -B4A, -H1A, all with serial numbers up to and including L-23521-51A. Also all of the above models, remanufactured by Lycoming which were shipped before June 1, 1983, regardless of serial numbers. Engine models above, the affected serial numbers and remanufactured engines shipped on or after June 1, 1983, incorporate a redesigned crankshaft and are not subject to this AD. Compliance is required as indicated unless already accomplished: To preclude the possibility of in-flight propeller flange separation, accomplish either (a) or (b) or (c). (a) Within the next 25 hours time in service and every 25 hours time in service thereafter, visually inspect the crankshaft flange in accordance with Inspection Procedure I specified in AVCO Lycoming Service Bulletin No. 465A, or FAA approved equivalent. Use a 10 power magnifying glass for the inspection procedure. (b) Within the next 25 hours time in service and every 100 hours time in service thereafter, comply with Magnaflux Inspection Procedure II specified in AVCO Lycoming Service Bulletin No. 465A or FAA approved equivalent. (c) The inspections required under (a) or (b) may be discontinued when the crankshaft is replaced with a redesigned crankshaft in accordance with Procedure III specified in AVCO Lycoming Service Bulletin No. 465A or FAA approved equivalent. (d) An equivalent method of compliance with this AD may be used if approved by the Manager, New York Aircraft Certification Office, FAA, New England Region. (e) Upon submission of substantiating data by an owner or operator through an FAA maintenance inspector, the Manager, New York Aircraft Certification Office, may adjust the compliance time specified in this AD. (f)In accordance with FAR 21.197 and 21.199, the aircraft may be flown to a location where the inspections or alterations required by this AD can be performed. AVCO Lycoming S/B No. 465A identified in this directive is incorporated herein and made by reference a part hereof pursuant to 5. U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents may obtain copies upon request to AVCO Lycoming Williamsport Division, 652 Oliver Street, Williamsport, Pennsylvania 17701. These documents may also be examined at the Office of Regional Counsel, FAA New England Regional Office, 12 New England Executive Park, Burlington, Massachusetts 01803. A historical file on this AD is maintained at the New England Regional Office. This amendment becomes effective on July 16, 1984. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS 1E10](https://openairdocs.org/tcds/1E10): Lycoming Engines; names 22 of 89 models: AEIO-360-A1B6, AIO-360-A1B, AIO-360-A2A, AEIO-360-B1B, AEIO-360-A1B, AEIO-360-A1C, AEIO-360-B1F, AIO-360-A2B… ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 952 (0 by airframe model, 952 by engine model) - Makers: American Champion 274, Bellanca 176, Great Lakes 84, Aerotek 50, Mooney 35, Avions Mudry ET Cie 16, Pitts 15, Moravan 13, Christen Industries 12, Extra Flugzeugbau 10 Models with the most aircraft: - [Lycoming AEIO-360 series](https://openairdocs.org/engine/lycoming-aeio-360-series): 884 aircraft (engine model) - [Lycoming AEIO-360-A1D](https://openairdocs.org/engine/lycoming-aeio-360-a1d): 15 aircraft (engine model) - [Lycoming AEIO-360-A1B6](https://openairdocs.org/engine/lycoming-aeio-360-a1b6): 11 aircraft (engine model) - [Lycoming AEIO-360-A1E](https://openairdocs.org/engine/lycoming-aeio-360-a1e): 11 aircraft (engine model) - [Lycoming AEIO-360-H1A](https://openairdocs.org/engine/lycoming-aeio-360-h1a): 8 aircraft (engine model) - [Lycoming AEIO-360-B2F](https://openairdocs.org/engine/lycoming-aeio-360-b2f): 7 aircraft (engine model) - [Lycoming AEIO-360-B4A](https://openairdocs.org/engine/lycoming-aeio-360-b4a): 5 aircraft (engine model) - [Lycoming AEIO-360-B1F](https://openairdocs.org/engine/lycoming-aeio-360-b1f): 4 aircraft (engine model) - [Lycoming AEIO-360-A1A](https://openairdocs.org/engine/lycoming-aeio-360-a1a): 3 aircraft (engine model) - [Lycoming AEIO-360-B1B](https://openairdocs.org/engine/lycoming-aeio-360-b1b): 2 aircraft (engine model) - [Lycoming AEIO-360-A1B](https://openairdocs.org/engine/lycoming-aeio-360-a1b): 1 aircraft (engine model) - [Lycoming AEIO-360-A2C](https://openairdocs.org/engine/lycoming-aeio-360-a2c): 1 aircraft (engine model) All 13 models: https://openairdocs.org/ad/84-13-05/models.md Every aircraft: https://openairdocs.org/ad/84-13-05/aircraft.md Its text cites no advisory circulars or STCs. ## NTSB investigations that cite this AD (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB LAX97FA291](https://openairdocs.org/ntsb/LAX97FA291), Aug 17, 1997: Hefner Pitts S1S (N10HJ), Van Nuys, CA, destroyed, 1 fatal. Probable cause: the operation of the propeller beyond the design rpm limitations and the resultant gyroscopic loads from aerobatics. Contributing to the accident was the lack of a required instrument panel rpm… --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.