# AD 64-09-02: Elevator

- 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: September 5, 1964
- Superseded by: Nothing supersedes this AD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/6361ADF839B4A6D286256CE500762756.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/64-09-02

## The airworthiness directive

64-09-02 BOEING: Amdt 717 Part 507 Federal Register April 21, 1964. Applies to All Models 707 and 720 Series Aircraft.

Compliance required as indicated.

There have been instances of above normal control column forces and sluggish airplane response. In all cases, the airplanes involved had been exposed to heavy rain prior to takeoff or had taken off in heavy rain, with comparatively low freezing altitudes prevailing. This can result in ice formation in the elevator balance panel hinge or around the balance panel track grip.

In order to preclude this unsafe condition, accomplish the following:

Within 600 hours' time in service after the effective date of this AD, and thereafter at intervals not exceeding 1,200 hours' time in service, accomplish the following or equivalent approved by Engineering and Manufacturing Branch, FAA Western Region:

  (a) Mix MIL-G-25760 or MIL-G-7118 grease or equivalent approved by Engineering and Manufacturing Branch, FAA WesternRegion, with Methyl Ethyl Ketone or aliphatic naptha (Varsol), or equivalent approved by Engineering and Manufacturing Branch, FAA Western Region, to a consistency suitable for application with a squirt type oil can, and apply a good coverage of lubricant to the following areas:

  (1) Upper surface of the piano hinge for each balance panel, and

  (2) On either side of both balance panel track grips.

  (b) Upon request of the operator, and FAA maintenance inspector, subject to prior approval of the Chief, Engineering and Manufacturing Branch, FAA Western Region, may adjust the repetitive intervals specified in this AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the increase for such operator.

(Boeing Service Bulletins Nos. 1865 and 1865A cover this same subject.)

This directive effective May 19, 1964.

Revised September 5, 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/64-09-02/models.md
Every aircraft: https://openairdocs.org/ad/64-09-02/aircraft.md

Its text cites no advisory circulars or STCs.

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