# AD 65-04-02: High Pressure Air Start System

- Type: Airworthiness directive
- Status: Current
- Products: Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body, 707-200, 707-300 Series, 707-300B Series, 707-300C Series, 707-400 Series, 720 Series and 720B Series
- Effective: March 19, 1965
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-34
- Registered aircraft: 6 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4BC4807F6CFB9E368625682E0053F8CD.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/65-04-02

## The airworthiness directive

65-04-02 BOEING: Amdt. 39-34 Part 39 Federal Register February 17, 1965. Applies to Models 707 and 720 Series Aircraft Equipped With an External High Pressure Air Start Connection.

Compliance required as indicated.

Failures of B-nuts on the high pressure air start system lines have occurred, resulting in whipping lines in the wheel well area. To correct this condition:

  (a) Within 500 hours' time in service from the effective date of this AD, unless already accomplished, accomplish one of the following or an equivalent approved by the Aircraft Engineering Division, FAA Western Region:

  (1) Replace all NAS 596-16 B-nuts on the one-inch high pressure air lines in the 3,000 p.s.i. high pressure air start bottle system with AN 818-16 nuts and MS 20819-16 sleeves in accordance with Boeing Alert Service Bulletin No. 2009 dated May 15, 1964;

  (2) Relocate air pressure regulator Boeing P/N 10-3358-1 to a position on the high pressure air start bottle and deactivate the external high pressure air start connection; or

  (3) Deactivate the high pressure air start system by removing the high pressure air start bottles and the external high pressure air start lines and connection.

(Boeing Alert Service Bulletin No. 2009 dated May 15, 1964, covers this subject.)

This directive effective March 19, 1965.

## Affected data sheets (3) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 4A21](https://openairdocs.org/tcds/4A21): The Boeing Company; names 4 of 4 models: 707-100B Short Body, 707-200, 707-100 Long Body, 707-100B Long Body
- [TCDS 4A26](https://openairdocs.org/tcds/4A26): The Boeing Company; names 4 of 4 models: 707-300B Series, 707-400 Series, 707-300 Series, 707-300C Series
- [TCDS 4A28](https://openairdocs.org/tcds/4A28): The Boeing Company; names 2 of 2 models: 720B Series, 720 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: 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/65-04-02/models.md
Every aircraft: https://openairdocs.org/ad/65-04-02/aircraft.md

Its text cites no advisory circulars or STCs.

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