# AD 71-25-06: Water At Station 360 Bulkhead

- 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: December 13, 1971
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-1357
- Registered aircraft: 6 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D6CC965D13C2497E86256832004A81C8.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/71-25-06

## The airworthiness directive

71-25-06 BOEING: Amdt. 39-1357. Applies to Model 707/720 airplanes certified in all categories. Compliance required within the next 300 hours time in service after effective date of this AD, unless already accomplished. To assure that water will not accumulate forward of the station 360 bulkhead on all Boeing Model 707/720 airplanes, accomplish one of the following: (1) Inspect the airplane per Boeing Service Bulletin 3027, dated 23 November 1971, or later FAA approved revisions. If the station 360 bulkhead drains are blocked or do not exist modify the station 360 bulkhead, bulkhead blanket and floor mat as described in the above service bulletin to provide the required drains. (2) Perform an equivalent inspection and (if required as a result of the inspection finding) modification approved by the Chief, Aircraft Engineering Division, FAA, Western Region. This amendment becomes effective December 13, 1971.

## 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/71-25-06/models.md
Every aircraft: https://openairdocs.org/ad/71-25-06/aircraft.md

Its text cites no advisory circulars or STCs.

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