AIRWORTHINESS DIRECTIVE

CAA-AD-T-074/1999

Date of issue: July 14, 1999

SAILPLANE - FLIGHT CONTROLS - INSPECTION

Applicability: Kind of aeronautical product: Sailplane, Manufacturer: Grob, Mindelheim, Germany, Type: TWIN ASTIR, Models affected: G 103 TWIN II (S/No.3501 up to 3729), G 103 A TWIN II ACRO (S/No.3544 up to 3729 (with suffix "K"), Serial numbers affected: see above.

Effective date: July 15, 1999.

Compliance : Required as indicated in LBA AD 1999-216/2.

Remarks: Where applicable, the requirements of this AD must be integrated into the Aircraft´s Logbook(s). Address inquiries concerning this AD to: Civil Aviation Authority, Airworthiness Division, Ruzyne Airport, 160 08 Prague 6, Czech Republic, tel: 420 2 33320922, fax: 420 2 20562270.

Ing. Pavel MATOUŠEK
Director of Airworthiness Division CAA CZ

Airworthiness Directive 1999-216/2

Luftfahrt-Bundesamt

Federal Republic of Germany

Effective Date: July 15,1999

Grob

Affected:

Kind of aeronautical product: Sailplane

Manufacturer: Grob, Mindelheim, Germany

Type: TWIN ASTIR

Models affected: G 103 TWIN II (S/No.3501 up to 3729)

G 103 A TWIN II ACRO (S/No.3544 up to 3729 (with suffix "K")

Serial numbers affected: see above

German Type Certificate No.: 315

Subject:

Flight Controls - Inspection / Replacement of the knurled nut at the rear control stick

Reason:

Single cases had been reported, where the fastening nut (knurled nut) was cracked. Previous investigations showed, that these damages may be caused inspection or replacement of the knurled nut is mandatory.

Action:

Inspection and replacement of the nut in accordance with the Service Bulletin of the manufacturer.

Compliance:

Inspect the nut for damages and especially for cracks before the next flight. If no damages and cracks were found, the inspection must be repeated before the first flight of each day until the knurled nut is replaced by a new nut made from stainless steel. The knurled nut must be replaced before December 31, 1999.

Technical publication of the manufacturer:

Grob Technical Note No. 315-61/2 dated June 28, 1999 which becomes herewith part of this AD and may be obtained from Messrs.:

Grob-Werke GmbH & Co.

Aerospace Division

P.O. Box 12 57

 

D-87712 Mindelheim

Federal Republic of Germany

Phone: ++ 49 8268 998-0

Fax: ++ 49 8268 998-190

Accomplishment and log book entry:

Action to be accomplished by an approved service station and to be checked and entered in the log book by a licensed inspector.

Note:

This AD supersedes AD-No.1999-216 dated July 01, 1999.

Holders of affected aircraft registered in Germany have to observe the following:

As a result of the a.m. deficiencies, the airworthiness of the aircraft is affected to such an extent that after the expiry of the a.m. dates the aircraft may be operated only after proper accomplishment of the prescribed actions. In the interest of aviation safety outweighing the interest of the receiver in a postponement of the prescribed actions, the immediate compliance with this AD is to be directed

Instructions about Available Leaal Remedies:

An appeal to this notice may be raised within a period of one month following notification. Appeals must be submitted in writing or registered at the Luftfahrt-Bundesamt, Hermann-Blenk-Str. 26, 38108 Braunschweig.