# AD 84-09-05: Modified Spheric Locking Bolt Installation

- Type: Airworthiness directive
- Status: Historical
- Products: GROB-WERKE G102 ASTIR CS
- Effective: May 3, 1984
- Superseded by: [AD 2006-17-02](https://openairdocs.org/ad/2006-17-02)
- Product type: Aircraft, Glider
- Amendment: 39-4849
- Registered aircraft: 38 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DF8DCB3BDB4CE96E86256A4E004C84FD.0001
- DRS record last changed: August 7, 2025
- Page: https://openairdocs.org/ad/84-09-05

## The airworthiness directive

84-09-05 BURKHART-GROB FLUGZEUGBAU INDUSTRIESTRABE: Amendment 39-4849. Applies to Model G102 ASTIR CS sailplanes, serial numbers 1001 through 1536 inclusive, certificated in any category.

Compliance is required within the next 100 hours time in service, or within 120 days, whichever occurs first, after the effective date of this AD, unless already accomplished.

To prevent bolt and pin failure, install modified spheric locking bolt, P/N 102-3500.21, and special nut, P/N 102-3510.21, in the forward horizontal stabilizer connection to the vertical stabilizer, and install new locking pins, P/N 102-2142.46, in the aft connecting plate for the horizontal stabilizer in accordance with instruction 1 and 2 of Grob Technical Information TM 306-17, dated June 10, 1981, or an FAA approved equivalent.

Equivalent means of compliance may be approved by the Manager, Aircraft Certification Staff, AEU-100, Europe, Africa and Middle East Office, FAA, c/o American Embassy, Brussels, Belgium.

The Burkhart Grob Flugzeugbau Industriestrabe Technical Information TM 306-17, dated June 10, 1981, identified and described in this directive is incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received this document from the manufacturer may obtain copies upon request to Burkhart Grob Flugzeugbau Industriestrabe, D-8948 Mindelheim-Mattsies, West Germany or upon request to Burkhart Grob of America, Inc., 1070 Navajo Drive, Bluffton, Ohio. These documents also may be examined at the Office of the Regional Counsel, 12 New England Executive Park, Burlington, Massachusetts 01803.

This amendment becomes effective on May 3, 1984.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS G33EU](https://openairdocs.org/tcds/G33EU): Fiberglas-Technik Rudolf Lindner GmbH & Co. KG; names 1 of 4 models: G102 ASTIR CS

## 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: 38 (38 by airframe model, 0 by engine model)
- Makers: Burkhart Grob Flugzeugbau 38

Models with the most aircraft:

- [Burkhart Grob Flugzeugbau G102 ASTIR CS](https://openairdocs.org/model/burkhart-grob-flugzeugbau-g102-astir-cs): 38 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/84-09-05/models.md
Every aircraft: https://openairdocs.org/ad/84-09-05/aircraft.md

## Related documents

- [AD 2006-17-02](https://openairdocs.org/ad/2006-17-02): Forward horizontal stabilizer connection · GROB-WERKE G102 ASTIR CS. Effective Sep 22, 2006. Supersedes this AD

Its text cites no advisory circulars or STCs.

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