# AD 47-30-08: Seat Modification

- Type: Airworthiness directive
- Status: Current
- Products: Gores, William 65-CA (Army L-3F), 65-LA and S-65-CA
- Effective: September 30, 1947
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 164 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C83BEA8949DC89E186256A33006F0A76.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/47-30-08

## The airworthiness directive

47-30-08 AERONCA: (Was Mandatory Note 9 of AD-675-2 and Mandatory Note 7 of AD- 702-1.) Applies to Models 65-CA, S-65-CA and 65-LA.

Compliance required not later than September 30, 1947.

In order to prevent the seat belt anchorage from failing during a crash landing, it has been found necessary to modify the seat installation as follows:

1. If there is no need for an adjustable seat, the rear sliding lugs on each side of the seat should be bolted to the slide tube using 3/16-inch AN bolts. Location of bolt approximately 1 1/8 inches below and 3/8 inch forward of center of seat cross tube.

2. If the seat is to remain adjustable, the rear sliding lugs on the seat are to be reinforced with two 0.094 inch, 1025 steel gussets. Weld corner gussets between fore and aft sides of seat cross tube and back face of seat slide lugs. Gussets are "L" shaped approximately 1 inch wide, extending around bottom lip of lugs. (Aeronca Service Memorandum M-76 dated May 15, 1947,covers this same subject.)

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-675](https://openairdocs.org/tcds/A-675): Thomas Gores; names 2 of 7 models: S-65-CA, 65-CA (Army L-3F)
- [TCDS A-702](https://openairdocs.org/tcds/A-702): Thomas Gores; names 1 of 4 models: 65-LA

## 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: 164 (164 by airframe model, 0 by engine model)
- Makers: Aeronca 163, Aeronca/Browne 1

Models with the most aircraft:

- [Aeronca 65-CA](https://openairdocs.org/model/aeronca-65-ca): 141 aircraft (airframe model)
- [Aeronca 65-LA](https://openairdocs.org/model/aeronca-65-la): 20 aircraft (airframe model)
- [Aeronca S-65-CA](https://openairdocs.org/model/aeronca-s-65-ca): 2 aircraft (airframe model)
- [Aeronca/Browne 65-CA](https://openairdocs.org/model/aeronca-browne-65-ca): 1 aircraft (airframe model)

All 4 models: https://openairdocs.org/ad/47-30-08/models.md
Every aircraft: https://openairdocs.org/ad/47-30-08/aircraft.md

Its text cites no advisory circulars or STCs.

## NTSB investigations that cite this AD (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB ERA13LA397](https://openairdocs.org/ntsb/ERA13LA397), Sep 1, 2013: Aeronca 65CA (N31915), Hardwick, VT, substantial damage. Probable cause: The improper maintenance of the carburetor, which resulted in a total loss of engine power due to carburetor flooding.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.