# AD 66-29-01: Cowl Panels

- Type: Airworthiness directive
- Status: Current
- Products: Boeing 727-100 Series, 727-100C Series, 727-200 Series, 727-200F Series, 727 Series and 727C Series
- Effective: December 5, 1966
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-301
- Registered aircraft: 25 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1927339324C503FE8625682E005BADD8.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/66-29-01

## The airworthiness directive

66-29-01 BOEING: Amdt. 39-301 Part 39 Federal Register November 5, 1966. Applies to Model 727 Series Airplanes.

Compliance required as indicated.

To prevent loss of the cowl panels in flight, and resulting damage to the aircraft structure, accomplish the following or an equivalent approved by the Chief, Aircraft Engineering Division, FAA Western Region:

  (a) Within the next 1,500 hours' time in service after the effective date of this AD, unless already accomplished, modify the side engine cowl panel latch assemblies in accordance with Boeing Service Bulletin No. 71-14 or later FAA-approved revision. Replacement of Hartwell Manufacturing Company hook latch spring, P/N 104914-1, with P/N 106054-1 is optional.

  (b) Within the next 3,000 hours' time in service after the effective date of this AD, unless already accomplished, modify the center engine cowl panel latch frames in accordance with Boeing Service Bulletin No. 71-27 or later FAA-approved revision.

Thisdirective effective December 5, 1966.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A3WE](https://openairdocs.org/tcds/A3WE): The Boeing Company; names 6 of 6 models: 727-100 Series, 727 Series, 727-200 Series, 727-100C Series, 727-200F Series, 727C Series

## 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: 25 (25 by airframe model, 0 by engine model)
- Makers: Boeing 25

Models with the most aircraft:

- [Boeing 727-223](https://openairdocs.org/model/boeing-727-223): 9 aircraft (airframe model)
- [Boeing 727-227](https://openairdocs.org/model/boeing-727-227): 4 aircraft (airframe model)
- [Boeing 727-225](https://openairdocs.org/model/boeing-727-225): 2 aircraft (airframe model)
- [Boeing 727-200F](https://openairdocs.org/model/boeing-727-200f): 1 aircraft (airframe model)
- [Boeing 727-200](https://openairdocs.org/model/boeing-727-200): 1 aircraft (airframe model)
- [Boeing 727-212](https://openairdocs.org/model/boeing-727-212): 1 aircraft (airframe model)
- [Boeing 727-230](https://openairdocs.org/model/boeing-727-230): 1 aircraft (airframe model)
- [Boeing 727-232](https://openairdocs.org/model/boeing-727-232): 1 aircraft (airframe model)
- [Boeing 727-243](https://openairdocs.org/model/boeing-727-243): 1 aircraft (airframe model)
- [Boeing 727-247](https://openairdocs.org/model/boeing-727-247): 1 aircraft (airframe model)
- [Boeing 727-264](https://openairdocs.org/model/boeing-727-264): 1 aircraft (airframe model)
- [Boeing 727-281](https://openairdocs.org/model/boeing-727-281): 1 aircraft (airframe model)
- [Boeing 727-277](https://openairdocs.org/model/boeing-727-277): 1 aircraft (airframe model)

All 13 models: https://openairdocs.org/ad/66-29-01/models.md
Every aircraft: https://openairdocs.org/ad/66-29-01/aircraft.md

Its text cites no advisory circulars or STCs.

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