# AD 64-03-01: Fuel Tank Access Panels - 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707-400 Series, 720 Series, 720B Series, 727-100 Series, 727-100C Series and 4 more - Effective: June 30, 1965 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Registered aircraft: 31 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EF8C61DD28B0028B862569910075FD5B.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/64-03-01 ## The airworthiness directive 64-03-01 BOEING: Amdt. 679 Part 507 Federal Register February 4, 1964. Applies to All Models 707, 720 and 727 Series Aircraft. Compliance required as soon as the modification can be scheduled but not later than 1,000 hours' time in service after the effective date of this AD unless already accomplished. Modify the fuel tank access panels and clamp rings in accordance with the following or Boeing Service Bulletin No. 1955 for 707 and 720 Series aircraft and Bulletin No. 28-7 for 727 Series aircraft or later FAA-approved revisions or an equivalent approved by the Chief, Aircraft Engineering Division, FAA Western Region: (a) Remove all fuel tank clamp rings and access doors from the aircraft. (b) Remove the phenolic insulation from the clamp ring by application of heat for 1 hour at 300 degrees F. (c) Clean all mating surfaces of the access door, clamp ring, and wing skin flange of all material coating such as primer, zinc chromate and anodizing by scraping andhand sanding to base metal with 600 grit aluminum oxide paper or equivalent. (d) Prepare a mixture of conductive anticorrosive Aeroshell No. 14 grease MIL-G-25537 and Alcoa 408 aluminum powder in a ratio by weight of 35 percent of Alcoa 408 and apply to mating surfaces of clamp ring in sufficient quantity so as to obtain good surface coverage when reinstalled. This directive effective February 4, 1964. Revised June 30, 1965. ## Affected data sheets (4) (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 - [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: 31 (31 by airframe model, 0 by engine model) - Makers: Boeing 31 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 707-338C](https://openairdocs.org/model/boeing-707-338c): 2 aircraft (airframe model) - [Boeing 727-225](https://openairdocs.org/model/boeing-727-225): 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) - [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 18 models: https://openairdocs.org/ad/64-03-01/models.md Every aircraft: https://openairdocs.org/ad/64-03-01/aircraft.md Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.