# AD 78-04-02: Attach Bolt Replacement

- Type: Airworthiness directive
- Status: Current
- Products: Boeing 737-100 Series, 737-200 Series and 737-200C Series
- Effective: August 16, 1978
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-3267
- Registered aircraft: 10 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/ADCE85C8B4FC575D86256E0D004A97BE.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/78-04-02

## The airworthiness directive

78-04-02 BOEING: Amendment 39-3140 as amended by Amendment 39-3267. Applies to all Boeing Model 737-100/200/200C/T43A series airplanes, listed in Boeing Service Bulletin No. 737-53-1048 which have not had the bolt replacement accomplished per figure 1 of that service bulletin, certificated in all categories. A. Within the next 75 flight hours time-in-service after January 16, 1978, unless accomplished within the last 3,000 flight hours time-in-service, accomplish paragraph B below. B. Remove panels 9126 L.H. and 9226 R.H. and check all attach bolts (16 per side) of the two horizontal stabilizer hinge outboard fittings for looseness. If found loose, before further flight, tighten bolt(s) to 65-80 in.-lbs. or accomplish the bolt replacement of figure 1 of Boeing Service Bulletin No. 737-53-1048, or later FAA approved revisions, or equivalent approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region. In the event it is impracticable to perform the inspection within 75 flight hours time-in-service after January 16, 1978, permission to ferry an airplane to a location where the inspection can be accomplished, may be obtained by contacting the Chief, Engineering and Manufacturing Branch, FAA Northwest Region. C. Within the next 3,000 flight hours time-in-service after the inspection accomplished per paragraph A of this AD, and thereafter at intervals not to exceed 3,000 flight hours time-in- service, accomplish the inspection of paragraph B. D. Terminating action to this AD consists of replacement of the attach bolts of the horizontal stabilizer hinge outboard fittings in accordance with Figure 1 of Boeing Service Bulletin No. 737-53-1048, or later FAA approved revisions, or in a manner approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer, may obtain copies upon request to Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124. These documents may also be examined at FAA, Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108. Amendment 39-3140 became effective February 14, 1978. This amendment 39-3267 becomes effective August 16, 1978.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A16WE](https://openairdocs.org/tcds/A16WE): The Boeing Company; names 3 of 17 models: 737-100 Series, 737-200C Series, 737-200 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: 10 (10 by airframe model, 0 by engine model)
- Makers: Boeing 10

Models with the most aircraft:

- [Boeing 737-205](https://openairdocs.org/model/boeing-737-205): 3 aircraft (airframe model)
- [Boeing 737-200](https://openairdocs.org/model/boeing-737-200): 1 aircraft (airframe model)
- [Boeing 737-201](https://openairdocs.org/model/boeing-737-201): 1 aircraft (airframe model)
- [Boeing 737-210C](https://openairdocs.org/model/boeing-737-210c): 1 aircraft (airframe model)
- [Boeing 737-242C](https://openairdocs.org/model/boeing-737-242c): 1 aircraft (airframe model)
- [Boeing 737-290C](https://openairdocs.org/model/boeing-737-290c): 1 aircraft (airframe model)
- [Boeing 737-209](https://openairdocs.org/model/boeing-737-209): 1 aircraft (airframe model)
- [Boeing 737-275C](https://openairdocs.org/model/boeing-737-275c): 1 aircraft (airframe model)

All 8 models: https://openairdocs.org/ad/78-04-02/models.md
Every aircraft: https://openairdocs.org/ad/78-04-02/aircraft.md

Its text cites no advisory circulars or STCs.

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