# AD 66-06-01: Thrust Reverser

- Type: Airworthiness directive
- Status: Current
- Products: Boeing 707-200, 707-300 Series, 707-300B Series and 707-300C Series
- Effective: February 22, 1966
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-197
- Registered aircraft: 6 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/40A249C9A2BC67BF8625682E005954DC.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/66-06-01

## The airworthiness directive

66-06-01 BOEING: Amdt. 39-197 Part 39 Federal Register February 22, 1966. Applies to Model 707-200 and -300 Series Airplanes Equipped with Pratt & Whitney JT4 Engines.

Compliance required as indicated, unless already accomplished.

To prevent loose B-nut on the thrust reverser P(s4) lines, accomplish one of the following or an equivalent approved by the Chief, Aircraft Engineering Division, FAA Western Region.

  (a) Within the next 1,200 hours' time in service after the effective date of this AD, replace P(s4) tube assemblies (located between the P(s4) engine bleed port and the thrust reverser directional control valve) that incorporate stainless steel 17-4 PH CRES sleeves with tube assemblies that incorporate case-hardened 316 CRES sleeves in accordance with Boeing Service Bulletin 2228, dated August 9, 1965, or later FAA-approved revision; or

  (b) Within the next 1,200 hours' time in service after the effective date of this AD, replace P(s4) tube assemblies (locatedbetween the P(s4) engine bleed port and the thrust reverse directional control valve) that incorporate stainless steel 17-4 PH CRES sleeves with tube assemblies that incorporate nickel plated carbon steel sleeves or silver plated carbon steel sleeves in accordance with Boeing Service Letter 6-7161-4-8966, dated May 11, 1965, and within the next 3,000 hours' time in service after the effective date of this AD, replace the assemblies that incorporate nickel or silver plated carbon steel sleeves with tube assemblies that incorporate case- hardened 316 CRES sleeves in accordance with Boeing Service Bulletin 2228, dated August 9, 1965, or later FAA-approved revision.

This supersedes AD 65-25-01.

This directive effective February 22, 1966.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 4A26](https://openairdocs.org/tcds/4A26): The Boeing Company; names 3 of 4 models: 707-300B Series, 707-300 Series, 707-300C Series
- [TCDS 4A21](https://openairdocs.org/tcds/4A21): The Boeing Company; names 1 of 4 models: 707-200

## 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: 6 (6 by airframe model, 0 by engine model)
- Makers: Boeing 6

Models with the most aircraft:

- [Boeing 707-338C](https://openairdocs.org/model/boeing-707-338c): 2 aircraft (airframe model)
- [Boeing 707-368C](https://openairdocs.org/model/boeing-707-368c): 1 aircraft (airframe model)
- [Boeing 707-321B](https://openairdocs.org/model/boeing-707-321b): 1 aircraft (airframe model)
- [Boeing 707-323B](https://openairdocs.org/model/boeing-707-323b): 1 aircraft (airframe model)
- [Boeing 707-351B](https://openairdocs.org/model/boeing-707-351b): 1 aircraft (airframe model)

All 5 models: https://openairdocs.org/ad/66-06-01/models.md
Every aircraft: https://openairdocs.org/ad/66-06-01/aircraft.md

Its text cites no advisory circulars or STCs.

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