# AD 61-13-03: Fuselage Modification

- Type: Airworthiness directive
- Status: Current
- Products: Alexander Schleicher K7
- Effective: June 24, 1961
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Glider
- Registered aircraft: 15 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B40A1267AEB6657586256A54006EACF9.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/61-13-03

## The airworthiness directive

61-13-03 SCHLEICHER: Amdt. 299 Part 507 Federal Register June 24, 1961. Applies to Model K7 Gliders With Serial Numbers Up To and Including 935 and Serial Number 984.

Compliance required prior to next flight unless already accomplished.

To preclude the buckling of fuselage steel tube members on each side at the rear of the fuselage, replacement of five tubes with tubes having greater wall thickness is required. Replace the existing steel tube diagonal members, counting forward from the tail post as follows, using Civil Aeronautics Manual 18 repair procedures or manufacturer's recommendation.

  (a) Right side only, third member: Replace with 12 MMS. (15/32"), outside diameter, 1MM. (.040") wall thickness tubes.

  (b) Right and left side, fourth and sixth members: Replace with 14 MMS. (9/16") outside diameter, 1 MM. (.040") wall thickness tubes.

(Schleicher Drawing No. L-211.10-A4 dated March 15, 1961, covers this subject.)

This directive effective June 24, 1961.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 7G3](https://openairdocs.org/tcds/7G3): Alexander Schleicher GmbH & Co. Segelflugzeugbau; names 1 of 2 models: K7

## 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: 15 (15 by airframe model, 0 by engine model)
- Makers: Schleicher Alexander 15

Models with the most aircraft:

- [Schleicher Alexander K 7](https://openairdocs.org/model/schleicher-alexander-k-7): 15 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/61-13-03/models.md
Every aircraft: https://openairdocs.org/ad/61-13-03/aircraft.md

Its text cites no advisory circulars or STCs.

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