# AD 49-16-01: Fuel Tank Baffles

- Type: Airworthiness directive
- Status: Current
- Products: Grumman American G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B)
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 34 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DB11F880F5D3AA5A86256A38005B37AA.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/49-16-01

## The airworthiness directive

49-16-01 GRUMMAN: Applies to Model G-21A Aircraft Serial Numbers B-34, B-35, B- 38 Through B-42, B-45 Through B-51, B-53, B-54, B-55, B-57 Through B-61, B-63, B-64, B-65, B-67, B-68, B-70, B-71, B-74, B-76, B-77, B-82, B-83, B-85 Through B-90, B-92, B-96 Through B-99, B-101, B-106, B-107, B-111, B-116, B-118, B-119, B-120, B-124, B-125, B-127 Through B-134, B-137 Through B-141, B-143, B-144, and B-145.

Compliance required as indicated.

By June 1, 1949, inspect the fuel tank baffles at wing Stations 42, 54, and 75 through the handholds in bottom of integral fuel tanks. If baffles are found riveted to angle stiffness, no further action is required. If baffle stiffeners are attached by spotwelds, inspect for cracks. Airplane may continue in service, if no cracks are found in baffles, providing inspection is repeated each 100 hours. If cracking is not extensive and no spotwelds are broken from ribs, the airplane may be operated if inspected each 50 hours. Extensively cracked baffles should be repaired by replacing spotwelded baffles with riveted baffles. For further details, contact Grumman Aircraft Engineering Corporation, Bethpage, N.Y.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS TC 654](https://openairdocs.org/tcds/TC%20654): Frakes Aviation; names 1 of 2 models: G-21A (Army OA-9; Navy JRF-1; -2; -3; -4; -5; and -6B)

## 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: 34 (34 by airframe model, 0 by engine model)
- Makers: Grumman 34

Models with the most aircraft:

- [Grumman G-21A](https://openairdocs.org/model/grumman-g-21a): 34 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/49-16-01/models.md
Every aircraft: https://openairdocs.org/ad/49-16-01/aircraft.md

Its text cites no advisory circulars or STCs.

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