AD 2003-19-14 R2

AD Final Rules - 2003-19-14 R2.pdf
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AD Number:
2003-19-14 R2
Document Type:
AD Final Rules
Docket Number:
FAA-2005-20441
Subject Heading:
Airworthiness Directives; BURKHART GROB LUFT--UND RAUMFAHRT GmbH & CO KG Models G103 TWIN ASTIR, G103A TWIN II ACRO, and G103C TWIN III ACRO Sailplane... ...Show more
Subject:
Airspeed indicators
Status:
Current
Citation:
(Federal Register: October 12, 2005 (Volume 70, Number 196))
Citation Publish Date:
10/12/2005
Effective Date:
11/30/2005
Make:
Burkhart Grob Luft-Und
Model:
G103 Twin Astir | G103A Twin II Acro | G103C Twin III Acro
Product Type:
Aircraft
Product Subtype:
Glider
Affected AD:
Superseded AD:
2003-19-14 R1
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
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[Federal Register: October 12, 2005 (Volume 70, Number 196)]


[Rules and Regulations]


[Page 59258-59263]


From the Federal Register Online via GPO Access [wais.access.gpo.gov]


[DOCID:fr12oc05-15]


–––––––––––––––––––––––––––––––––––


DEPARTMENT OF TRANSPORTATION


Federal Aviation Administration


14 CFR Part 39


[Docket No. FAA-2005-20441; Directorate Identifier 2003-CE-35-AD; Amendment 39-14322;


AD 2003-19-14 R2]


RIN 2120-AA64


Airworthiness Directives; BURKHART GROB LUFT–UND RAUMFAHRT GmbH & CO KG


Models G103 TWIN ASTIR, G103A TWIN II ACRO, and G103C TWIN III ACRO Sailplanes


AGENCY:
 
Federal Aviation Administration (FAA), DOT.


ACTION:
 
Final rule.


–––––––––––––––––––––––––––––––––––


SUMMARY:
 
The FAA is revising Airworthiness Directive (AD) 2003-19-14 R1, which applies to


certain BURKHART GROB LUFT–UND RAUMFAHRT GmbH & CO KG (GROB) Models G103


TWIN ASTIR, G103A TWIN II ACRO, and G103C TWIN III ACRO sailplanes. AD 2003-19-14 R1


requires you to modify the airspeed indicators, install flight speed reduction and aerobatic maneuver


restrictions placards (as applicable), and revise the flight and maintenance manuals. AD 2003-19-14


R1 approves simple aerobatic maneuvers for Model G103A TWIN II ACRO sailplanes and provides


an option for modifying the rear fuselage for Models G103A TWIN II ACRO and G103C TWIN III


ACRO sailplanes to terminate the flight limitation restrictions for aerobatic maneuvers. This AD


retains all the actions from AD 2003-19-14 R1 for Models G103A TWIN II ACRO and G103C


TWIN III ACRO and reinstates certain operating limits for Model G103 TWIN ASTIR sailplanes.


We are issuing this AD to prevent damage to the fuselage during limit load flight, which could result


in reduced structural integrity. This condition could lead to loss of control of the sailplane.


DATES:
 
This AD becomes effective on November 30, 2005.


On August 12, 2004 (69 FR 34258, June 21, 2004) the Director of the Federal Register approved


the incorporation by reference GROB Service Bulletin No. MSB315-65, dated September 15, 2003;


GROB Service Bulletin No. OSB 315-66, dated October 16, 2003; and GROB Work Instruction for


OSB 315-66, dated October 16, 2003.


As of November 30, 2005, the Director of the Federal Register approved the incorporation by


reference of GROB Service Bulletin No. MSB315-64/3, dated September 14, 2004.


ADDRESSES:
 
To get the service information identified in this AD, contact GROB Luft-und


Raumfahrt, Lettenbachstrasse 9, D-86874 Tussenhausen-Mattsies, Germany; telephone: 011 49 8268


998139; facsimile: 011 49 8268 998200; e-mail:
 
productsupport@grob-aerospace.de
.
2


To view the AD docket, go to the Docket Management Facility; U.S. Department of


Transportation, 400 Seventh Street, SW., Nassif Building, Room PL-401, Washington, DC 20590-


001 or on the Internet at
 
http://dms.dot.gov
. The docket number is FAA-2005-20441; Directorate


Identifier 2003-CE-35-AD.


FOR FURTHER INFORMATION CONTACT:
 
Gregory A. Davison, Aerospace Engineer, FAA,


Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816)


329-4130; facsimile: (816) 329-4090.


SUPPLEMENTARY INFORMATION:


Discussion


Has FAA taken any action to this point?
 
Reports from the Luftfahrt-Bundesamt (LBA), which is


the airworthiness authority for Germany, that the safety margins established into the design of the


fuselage may not be sufficient to sustain limit loads during certain maneuvers and during flight at


certain speeds for Model G103 TWIN ASTIR, G103 TWIN II, G103A TWIN II ACRO, and G103C


TWIN III ACRO sailplanes. This caused us to issue AD 2003-19-14, Amendment 39-13317 (68 FR


56152, September 30, 2003). AD 2003-19-14 required the following:


–Modifying the airspeed indicators;


–Installing placards restricting flight speeds, prohibiting aerobatic maneuvers, and restricting load


limits; and


–Incorporating revisions to the flight and maintenance manuals.


AD 2003-19-14 was issued as an interim action until the manufacturer completed further


investigations into the effects of certain flight conditions on the fuselage structure and the


development of corrective procedures.


The manufacturer conducted further investigations and static strength tests to verify the safety


margins of the fuselage on the affected sailplanes. This information prompted us to issue AD 2003-


19-14 R1, Amendment 39-13676 (69 FR 34258, June 21, 2004). AD 2003-19-14 R1 requires the


following:


For Model G103 TWIN ASTIR sailplanes:


–Retain all flight limitation restrictions in AD 2003-19-14.


For Model G103 TWIN II sailplanes:


–Reinstate the original flight speed limitations and maneuver operations and remove from the


applicability section of AD 2003-19-14;


For Model G103A TWIN II ACRO (utility category) sailplanes:


–Reinstate the original flight speed limitations and maneuver operations; and


–Allow only basic aerobatic maneuvers (spins, lazy eights, chandelles, stall turns, steep turns, and


positive loops).


For Model G103A TWIN II ACRO (aerobatic category) sailplanes:


–Reinstate the original flight speed limitations except for rough air (VB) and maneuvering speeds


(VA); and


–Allow only basic aerobatic maneuvers (spins, lazy eights, chandelles, stall turns, steep turns, and


positive loops).