# AD 47-25-06: Carburetor Flexible Air Duct

- 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- Superseded by: Nothing supersedes this AD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/7D8BFF000500410E86256A56006B83DD.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/47-25-06

## The airworthiness directive

47-25-06 GLOBE: (Was Mandatory Note 10 of AD-766-5.) Applies to Models GC-1A and GC-1B Aircraft Serial Numbers 3 to 157 Inclusive, and Number 159.

Compliance required prior to August 1, 1947.

Remove the carburetor flexible air duct, P/N 11-440-3405 and metal air intake scoop, at point of attachment at rear right engine cylinder and outboard connection to the right exhaust heater shroud. Replace with flexible air duct, Globe P/N 11-440-3648, and elbow, Globe P/N 11- 440-3729. This is necessary to prevent collapsing of the air duct when the carburetor air heater is used.

(Globe Customer Service Maintenance Bulletin No. 5 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/47-25-06/models.md
Every aircraft: https://openairdocs.org/ad/47-25-06/aircraft.md

Its text cites no advisory circulars or STCs.

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