# AD 64-04-03: Air Door Hinge

- Type: Airworthiness directive
- Status: Current
- Products: American Champion 7GC, 7GCA, 7GCB, 7GCBA, 7HC and 7KC
- Effective: March 9, 1964
- Published: February 8, 1964
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 122 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/609774260161DFBE86256A380054CAAE.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/64-04-03

## The airworthiness directive

64-04-03 CHAMPION: Amdt. 683 Part 507 Federal Register February 8, 1964. Applies to All Models 7GCB, 7GCBA, 7KC and All Models 7GC, 7GCA and 7HC Series Aircraft Using the 4-1099 Airscoop Box with Elliptical Fram Air Filter.

Compliance required within 50 hours' time in service after the effective date of this AD unless already accomplished.

As a result of several cases of engine power loss due to the carburetor alternate air door being sucked into the engine, make the spring loaded alternate air door inoperative by one of the following:

  (a) Locking the door in the closed position by installing a 0.040 x 1/2 x 4 1/2 5052- H34 aluminum strap or equivalent across the door and attach with two AN 515-8-6 screws and AN 365-832 nuts; or

  (b) Removing the entire door assembly and covering the opening with a 0.040 x 4 x 4 5052-H34 aluminum patch or equivalent. Attach the patch with eight AN 470AD3-4 rivets evenly spaced.

(Champion Service Letter No. 59 covers the same subject.)

This directive effective March 9, 1964.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-759](https://openairdocs.org/tcds/A-759): American Champion Aircraft Corp.; names 6 of 22 models: 7KC, 7GCBA, 7GCA, 7GC, 7HC, 7GCB

## 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: 122 (122 by airframe model, 0 by engine model)
- Makers: Champion 119, Aeronca 3

Models with the most aircraft:

- [Champion 7GCB](https://openairdocs.org/model/champion-7gcb): 55 aircraft (airframe model)
- [Champion 7GC](https://openairdocs.org/model/champion-7gc): 37 aircraft (airframe model)
- [Champion 7HC](https://openairdocs.org/model/champion-7hc): 8 aircraft (airframe model)
- [Champion AERONCA 7GC](https://openairdocs.org/model/champion-aeronca-7gc): 7 aircraft (airframe model)
- [Champion AERONCA 7GCB](https://openairdocs.org/model/champion-aeronca-7gcb): 3 aircraft (airframe model)
- [Champion AERONCA 7HC](https://openairdocs.org/model/champion-aeronca-7hc): 3 aircraft (airframe model)
- [Aeronca 7GC](https://openairdocs.org/model/aeronca-7gc): 2 aircraft (airframe model)
- [Champion 7GCA](https://openairdocs.org/model/champion-7gca): 2 aircraft (airframe model)
- [Champion 7GCBA](https://openairdocs.org/model/champion-7gcba): 2 aircraft (airframe model)
- [Aeronca 7GCB](https://openairdocs.org/model/aeronca-7gcb): 1 aircraft (airframe model)
- [Champion AERONCA 7GCA](https://openairdocs.org/model/champion-aeronca-7gca): 1 aircraft (airframe model)
- [Champion 7KC](https://openairdocs.org/model/champion-7kc): 1 aircraft (airframe model)

All 12 models: https://openairdocs.org/ad/64-04-03/models.md
Every aircraft: https://openairdocs.org/ad/64-04-03/aircraft.md

Its text cites no advisory circulars or STCs.

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