# AD 62-03-02: Hydraulic Valve Tappet Body and Plunger Assembly

- Type: Airworthiness directive
- Status: Current
- Products: Lycoming Engines VO-540-A1A, VO-540-B1A, VO-540-B1B, VO-540-B1B3, VO-540-B1C, VO-540-B1D, VO-540-B1E, VO-540-C1A and VO-540-C1B
- Effective: February 27, 1962
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Registered aircraft: 113 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2618BE57F1BD20AB862569B300711EFF.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/62-03-02

## The airworthiness directive

62-03-02 LYCOMING: Amdt. 394 Part 507 Federal Register January 26, 1962. Applies to All VO-540 Series Engines. Compliance required as indicated. To preclude failures of the hydraulic valve tappet body and plunger assembly, an improved hydraulic tappet body and plunger assembly has been provided. Unless already incorporated, install a Lycoming P/N 72876 plunger assembly and a Lycoming P/N 73061 tappet body at the next engine overhaul after the effective date of this AD. (Lycoming Service Instruction No. 1011 covers this same subject.) This directive effective February 27, 1962.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E-304](https://openairdocs.org/tcds/E-304): Lycoming Engines; names 9 of 21 models: VO-540-B1B3, VO-540-B1D, VO-540-B1C, VO-540-B1A, VO-540-B1B, VO-540-B1E, VO-540-C1A, VO-540-A1A…

## 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: 113 (0 by airframe model, 113 by engine model)
- Makers: Hiller 56, Bell 44, Piper 6, Brantly 2, Texas Helicopter 2, Anthony L R/Anthony D J 1, Cessna 1, Hiller-Rogerson Helicopter 1

Models with the most aircraft:

- [Lycoming VO-540 series](https://openairdocs.org/engine/lycoming-vo-540-series): 110 aircraft (engine model)
- [Lycoming VO-540-B1B3](https://openairdocs.org/engine/lycoming-vo-540-b1b3): 3 aircraft (engine model)

All 3 models: https://openairdocs.org/ad/62-03-02/models.md
Every aircraft: https://openairdocs.org/ad/62-03-02/aircraft.md

Its text cites no advisory circulars or STCs.

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