FAA orders · airworthiness directive · current

2004-17-04: Airspeed indicator

FAA order 2004-17-04 is an airworthiness directive in force since October 7, 2004. The FAA's subject line: Airspeed indicator. It names Burkhart Grob Flugzeugbau G102: about 59 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: flight controls.

What it applies to as the FAA lists it

Kind of product: Aircraft
Makes: GROB-WERKE GMBH & CO KG
Models: G102 CLUB ASTIR III, G102 CLUB ASTIR IIIb, G102 Standard Astir III
On this site: Burkhart Grob Flugzeugbau G102 59 registered

Dates and paperwork

In force since: October 7, 2004
Published: August 23, 2004 (signed August 13, 2004)
Docket: 2004-CE-10-AD
Replaces: 2001-26-25
Status: Current
The FAA's document: Read the order on the FAA's site

The FAA's summary their words, unchanged

The FAA supersedes Airworthiness Directive (AD) 2001-26-25, which applies to all Grob-Werke Gmbh & Co KG (Grob) Models G102 CLUB ASTIR III, G102 CLUB ASTIR IIIb, and G102 STANDARD ASTIR III sailplanes. AD 2001-26-25 currently requires you to apply a red mark and install a placard on the airspeed indicator to restrict the Vne airspeed. This AD requires you to install additional mass balance in the elevator and ailerons and determine resultant empty weight and empty weight center of gravity; incorporate a revision in the sailplane maintenance manual; and remove the red mark and the red placard on the airspeed indicator (both required by AD 2001-26-25). This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Germany. We are issuing this AD to prevent elevator flutter, which could cause structural damage. Such damage could result in loss of control of the sailplane.

The order itself the regulatory text, as published

Show the full text (4,954 characters)

2004-17-04 Grob-Werke Gmbh & Co KG: Amendment 39-13776; Docket No. 2004-CE-10-AD. 

When Does This AD Become Effective? 

	(a) This AD becomes effective on October 7, 2004. 

What Other ADs Are Affected by This Action? 

	(b) This AD supersedes AD 2001-26-25. 

What Sailplanes Are Affected by This AD? 

	(c) This AD affects the following Models G102 CLUB ASTIR III, G102 CLUB ASTIR IIIb, and G102 STANDARD ASTIR III sailplanes, all serial numbers, that are certificated in any category. 

What Is the Unsafe Condition Presented in This AD? 

	(d) This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Germany. The actions specified in this AD are intended to prevent elevator flutter, which could cause structural damage. Such damage could result in loss of control of the sailplane. 

What Must I Do To Address This Problem? 

	(e) To address this problem, you must do the following, unless already done:Actions 
Compliance 
Procedures 
(1) Install additional mass balance in the elevator and ailerons and determine resultant empty weight and empty weight center of gravity. 
Within the next 25 hours time-in-service (TIS) after October 7, 2004 (the effective date of this AD). 
Follow GROB Luft-und Raumfahrt Service Bulletin No. MSB306-36/3, dated December 4, 2002; GROB Luft-und Raumfahrt Service Installation Instructions No. MSB306-36/3, dated April 18, 2002; and Instructions for Continued Airworthiness GROB G 102, Revision 1, dated April 18, 2002. The applicable sailplane maintenance 
manual also addresses this issue. 
(2) Incorporate Instructions for Continued Airworthiness GROB G 102, Revision 1, dated April 18, 2002, in the sailplane maintenance manual, or other appropriate document. 
Before further flight after installing the additional mass balance and determining the empty weight and empty weight center of gravity required by paragraph (e)(1) of this AD. 
Not applicable. 
(3) Remove the red mark on the airspeed indicator (formerly required by AD 2001-26-25) at 165 kilometers/hour (km/h), 89.1 knots 
(kts), or 102.5 miles per hour (mph). 
Before further flight after installing the additional mass balance and determining the empty weight and empty weight center of gravity required by paragraph (e)(1) of this AD. 
Follow GROB Luft-und Raumfahrt Service Bulletin No. MSB306-36/3, dated December 4, 2002, and GROG Luft-und Raumfahrt Service Installation Instruction No. MSB306-36/3, dated April 18, 2002. The applicable sailplane maintenance manual also addresses this issue. 
(4) Remove the red placard to the airspeed indicator (formerly required by AD 2001-26-25) restricting the Vne airspeed to 165 km/h, 89.1 kts, or 102.5 mph (according to the airspeed indicator calibration). 
Before further flight after installing the additional mass balance and determining the empty weight and empty weight center of gravity required by paragraph (e)(1) of this AD.Not applicable. 


May I Request an Alternative Method of Compliance? 

	(f) You may request a different method of compliance or a different compliance time for this AD by following the procedures in 14 CFR 39.19. Unless FAA authorizes otherwise, send your request to your principal inspector. The principal inspector may add comments and will send your request to the Manager, Standards Office, Small Airplane Directorate, FAA. For information on any already approved alternative methods of compliance, contact Greg Davison, Aerospace Engineer, FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 329-4130; facsimile: (816) 329-4090. 

Does This AD Incorporate Any Material by Reference? 

	(g) You must do the actions required by this AD following the instructions in GROB Luft-und Raumfahrt Service Bulletin No. MSB306- 36/3, dated December 4, 2002; GROB Luft-und Raumfahrt Service Installation Instructions No. MSB306-36/3, dated April18, 2002; and Instructions for Continued Airworthiness GROB G 102, Revision 1, dated April 18, 2002. The Director of the Federal Register approved the incorporation by reference of this service bulletin in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. You may get a copy from GROB Luft-und Raumfahrt, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies, Federal Republic of Germany; telephone: 49 8268 998139; facsimile: 49 8268 998200. You may review copies at FAA, Central Region, Office of the Regional Counsel, 901 Locust, Room 506, Kansas City, Missouri 64106; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html . 

Is There Other Information That Relates to This Subject? 

	(h) German AD Numbers 2001-317/4, dated January 9, 2003, and 2001-317/3, dated November 14, 2002, also address the subject of this AD.

Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of October 23, 2026. Connections as data: /graph/directive/2004-17-04.json · aircraft systems.