# AD 48-28-01: Fuselage Bulkhead Rework

- Type: Airworthiness directive
- Status: Current
- Products: Swift Museum Foundation GC-1A and GC-1B
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 541 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9A40D19A5C5C410586256A56006B9ADE.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/48-28-01

## The airworthiness directive

48-28-01 TEMCO: Applies to All Models GC-1A and GC-1B Aircraft.

I. Inspection required at each 20 hours operation until compliance with item II is made.

Cracks are occurring in the last bulkhead (Station 185) of the fuselage at the bottom rudder hinge and stop fitting, and the bulkhead must be inspected for such cracks. If cracks are found, a repair must be made in accordance with item II.

II. Compliance required not later than September 1, 1948.

To preclude the possibility of a structural failure in the rear bulkhead of the fuselage, at the bottom rudder hinge and stop, a steel reinforcement must be made as follows:

1. If cracks are found in the bulkhead drill No. 50 (0.07 diameter) check holes at end of each crack.

2. Fabricate and install a steel reinforcement fitting as defined in TEMCO Drawing 11-213-5074.

The Texas Engineering and Manufacturing Co., Inc., will furnish free of charge the steel reinforcement fitting described in item 2.

(TEMCO Customer Service Maintenance Bulletin No. 26 covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-766](https://openairdocs.org/tcds/A-766): Swift Museum Foundation Inc.; names 2 of 2 models: GC-1A, GC-1B

## 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: 541 (541 by airframe model, 0 by engine model)
- Makers: Globe 426, Temco 115

Models with the most aircraft:

- [Globe GC-1B](https://openairdocs.org/model/globe-gc-1b): 395 aircraft (airframe model)
- [Temco GC-1B](https://openairdocs.org/model/temco-gc-1b): 115 aircraft (airframe model)
- [Globe GC-1A](https://openairdocs.org/model/globe-gc-1a): 31 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/48-28-01/models.md
Every aircraft: https://openairdocs.org/ad/48-28-01/aircraft.md

Its text cites no advisory circulars or STCs.

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