# AD 68-21-01: Horizontal Stabilizer

- Type: Airworthiness directive
- Status: Current
- Products: Glasflugel H 301 Libelle
- Effective: October 23, 1968
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Glider
- Amendment: 39-666
- Registered aircraft: 30 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/384BBBA4CB66462F86256A38005A2FCD.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/68-21-01

## The airworthiness directive

68-21-01 GLASFLUGEL: Amendment 39-666. Applies to Glasflugel H-301 "Libelle" Gliders, Serial Numbers 1 through 85.

Compliance required within the next 25 hours' time in service after the effective date of this AD, unless already accomplished.

To prevent the improper installation of the horizontal stabilizer to the glider, install locking guide fitting P/N 301-33-8, either on the left or right side of the main elevator fitting in accordance with Glasflugel Modification Leaflet No. 25, dated August 13, 1968, or later LBA- approved issue or an FAA approved equivalent.

This amendment becomes effective October 23, 1968.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS G12EU](https://openairdocs.org/tcds/G12EU): Glasflugel; names 1 of 5 models: H 301 Libelle

## 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: 30 (30 by airframe model, 0 by engine model)
- Makers: Glasflugel 30

Models with the most aircraft:

- [Glasflugel H 301 LIBELLE](https://openairdocs.org/model/glasflugel-h-301-libelle): 30 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/68-21-01/models.md
Every aircraft: https://openairdocs.org/ad/68-21-01/aircraft.md

Its text cites no advisory circulars or STCs.

---
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.