# AD 64-03-02: Wing Fuel Tanks

- 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
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 6 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E90A5414F44A9FFA8625699200484775.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/64-03-02

## The airworthiness directive

64-03-02 BOEING: Amdt. 681 Part 507 Federal Register February 7, 1964. Applies to All Models 707 and 720 Series Aircraft.

Compliance required at the next terminal where adequate facilities and personnel are available but not to exceed 25 hours' time in service after the effective date of this AD, unless already accomplished in accordance with Boeing Alert Service Bulletins Nos. 1964 and 1964A.

As a result of recently discovered cracking in the wing structure accomplish the following inspection external to the wing fuel tanks:

  (a) On all Models 707-300 and -400 Series aircraft, visually inspect the left and right wing upper rear spar chord for evidence of cracking of the vertical leg of the chord member in the vicinity of wing Station 208.

  (b) On all Models 707 and 720 Series aircraft, visually inspect the left and right wing upper and lower front spar chord for evidence of longitudinal cracking of the vertical leg adjacent to the fillet between the vertical and horizontal legs of the chord in the vicinity of Wing Station 727 outboard to the production splice station.

  (c) Repair any cracked chord member before further flight, in accordance with technical data approved by the Engineering and Manufacturing Branch, FAA Western Region.

(Boeing Alert Service Bulletins Nos. 1964 and 1964A cover this same subject.)

This directive effective upon publication in the Federal Register for all persons except those to whom it was made effective immediately by telegram dated January 24, 1964.

## 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/64-03-02/models.md
Every aircraft: https://openairdocs.org/ad/64-03-02/aircraft.md

Its text cites no advisory circulars or STCs.

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