# AD 66-27-03: Tail Cone

- 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: November 5, 1966
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-307
- Registered aircraft: 6 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F4041855DAB465448625682E005B9153.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/66-27-03

## The airworthiness directive

66-27-03 BOEING: Amdt. 39-307 Part 39 Federal Register November 5, 1966. Applies to Models 707 and 720 Series Airplanes Equipped With Nylon Tube Conduit in the Tail Cone.

Compliance required as indicated, unless already accomplished.

To prevent fire in the tail cone due to shorted tail navigation light wires, accomplish the following:

  (a) Within the next 300 hours' time in service after October 12, 1966, unless already accomplished, inspect tail navigation light wiring for frayed or deteriorated wires and inspect protective nylon tube to ensure that it is secured to bulkhead. Replace frayed or deteriorated wires and secure nylon tube to bulkhead as necessary before further flight.

  (b) Repeat the inspection described in (a) every 300 hours' time in service until the following modifications or equivalent modifications approved by the Chief, Aircraft Engineering Division, FAA Western Region are accomplished but not later than 2,250 hours' time in service from theeffective date of this AD

  (1) Trim nylon tube flush with bulkhead 65-14660-3 at Fuselage Station 1653;

  (2) Install cover plate and angle fabricated in accordance with Boeing Service Bulletin No. 2395(R-1) or later FAA-approved revision using a clamp and grommet in accordance with that Bulletin; and

  (3) Replace all frayed or chafed tail cone light wiring.

This supersedes AD 66-24-02.

This directive effective November 5, 1966.

## 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/66-27-03/models.md
Every aircraft: https://openairdocs.org/ad/66-27-03/aircraft.md

Its text cites no advisory circulars or STCs.

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