# AD 93-14-15: Instrument Panel Placard,

- Type: Airworthiness directive
- Status: Current
- Products: Lycoming Engines IO-360-A1B6D and IO-360-A3B6D with STC SA4758NM or SE4757NM
- Effective: August 23, 1993
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-8639
- Docket: 91-ANE-30
- Registered aircraft: 7,316 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B5744B58422970198625684D00565464.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/93-14-15

## The airworthiness directive

93-14-15 AVCO LYCOMING: Amendment 39-8639. Docket No. 91-ANE-30. Applicability: Lycoming Model IO-360-A1B6D and IO-360-A3B6D engines, modified per Aircraft Design, Inc., STC SE4757NM; installed on Mooney M20J, modified per Aircraft Design, Inc., STC SA4758NM. Compliance: Required within 30 days after the effective date of this AD, unless accomplished previously. To prevent possible premature engine failure, accomplish the following: (a) Fabricate and install on the instrument panel a placard, in accordance with FAR 23.1541(b), stating "DO NOT OPERATE ENGINE ABOVE 33.0 IN Hg." (b) Re-mark the manifold pressure gauge by removing the radial red line at 38.5 Hg and placing the radial red line at 33.0 Hg. (c) Revise the Limitations and Normal Procedure Sections of the Aircraft Flight Manual Supplement as follows: (1) Delete "38.5" Hg" as it appears in these sections and insert in lieu thereof "33.0" Hg." (2) Delete "36.0 Hg" as it appears in Normal Climb Throttle and insert in lieu thereof "33.0 Hg." (d) Attach this AD as a permanent appendix to the Aircraft Flight Manual. (e) An alternative method of compliance, or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Seattle Aircraft Certification Office. The request shall be forwarded through an appropriate FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Seattle Aircraft Certification Office. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Seattle Aircraft Certification Office. (f) Special flight permits may be issued, in accordance with FAR 21.197 and 21.199, to ferry the aircraft to a location where the requirements of this AD can be accomplished. (g) This amendment becomes effective on August 23, 1993.

## 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 2 of 89 models: IO-360-A3B6D, IO-360-A1B6D

## 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: 7,316 (0 by airframe model, 7,316 by engine model)
- Makers: Piper 2,083, Mooney 1,924, Cessna 1,465, Beech 437, Diamond Aircraft Ind 175, Rockwell International 125, Aero Commander 74, Lake 48, Aerotek 44, Hughes 43

Models with the most aircraft:

- [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series): 6,174 aircraft (engine model)
- [Lycoming IO-360-A1B6D](https://openairdocs.org/engine/lycoming-io-360-a1b6d): 844 aircraft (engine model)
- [Lycoming IO-360 series](https://openairdocs.org/engine/lycoming-io-360-series): 217 aircraft (engine model)
- [Lycoming IO-360-A3B6D](https://openairdocs.org/engine/lycoming-io-360-a3b6d): 74 aircraft (engine model)
- [Lycoming I0-360 series](https://openairdocs.org/engine/lycoming-i0-360-series): 7 aircraft (engine model)

All 5 models: https://openairdocs.org/ad/93-14-15/models.md
Every aircraft: https://openairdocs.org/ad/93-14-15/aircraft.md

## Related documents

- [STC SA4758NM](https://openairdocs.org/stc/SA4758NM): Installation of a Lycoming IO-360-A1B6D or IO-360-A3B6D engine modified.. Aircraft Design Inc, Named in the applicability
- [STC SE4757NM](https://openairdocs.org/stc/SE4757NM): Installation of Rotomaster turbo- charger, scavenge pump, diaphragm fuel pump, fuel injectors, fixed wastegate, and an ACD intercooler.. Aircraft Design Inc, Named in the applicability

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