AD 81-12-51

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AD Number:
81-12-51
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; FLUG UND FAHRZEUGWERKE Model Diamant HBV and 16.5 Gliders
Subject:
Rudder Close Tolerance Bolt
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
10/22/1981
Make:
Flug- und Fahrzeugwerke Ag
Model:
Diamant 16.5 | HBV Diamant
Product Type:
Aircraft
Product Subtype:
Glider
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 81-12-51
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-4239

AD NUMBER:   81-12-51

SUBJECT HEADING:   Airworthiness Directives; FLUG UND FAHRZEUGWERKE Model Diamant HBV and 16.5 Gliders


ACTION:  

SUMMARY:  

DATES:   Effective October 22, 1981.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
81-12-51 FLUG UND FAHRZEUGWERKE AG: Amendment 39-4239. Applies to AG Model Diamant HBV and 16.5 gliders, certificated in all categories.

Compliance required as indicated, unless already accomplished.

To prevent loss of the rudder lower close tolerance bolt, which could result in loss of the rudder, accomplish the following:

(a) Before further flight, unless already accomplished within the last 25 flight hours, and thereafter at intervals not to exceed 25 flight hours until replacement per paragraph (b) is accomplished, inspect the rudder close tolerance bolt for tightness in accordance with Flug Und Fahrzeugwerke AG Service Bulletin Number 10, dated April 1981, or in accordance with applicable criteria of FAA Advisory Circular 43.13-1A. If the bolt is loose (free to rotate), before further flight, replace the bolt in accordance with the above noted Service Bulletin, or an FAA- approved equivalent.

(b) Unless already accomplished, prior to January 1, 1982, replace the rudder close tolerance bolt in accordance with Flug Und Fahrzeugwerke AG Service Bulletin Number 10, dated April 1981, or an FAA-approved equivalent, as follows:

(1) Remove rudder as follows:

(i) Push rudder to the right deflection limit so that the bolt is visible through the opening on the left side of the rudder.

(ii) Remove connecting bolt at the end of the push rod.

(iii) Remove close tolerance bolt.

(iv) Remove rudder from the bearing block by pulling the rudder backwards. As soon as the rudder is off the bearing block, pull the rudder downwards to remove it from the upper bearing.

(2) Modification procedure:

(i) On the lower bearing block, remove both rivets from the anchor nut. Then rivet bracket and sheet together again (without anchor nut).

(ii) Mount rudder in reverse order to Item 1.

(iii) Check deflections according to the flight manual, Item 5.2. (plus or minus 30 degrees, +3 degrees, -0 degrees).

(iv) Check rudder and elevator controls for free movement.

(3) Material:

Materials	Part Number
1 connecting bolt	D1.206-0303
1 spacer	R20002 AN 960-C10L
2 castle nuts	M6 VSM 13780
2 cotter pins	1.6 x 16 VSM 12760
1 close tolerance bolt	D1.201-1228.1
2 rivets	MS 20470-AD2-10

(c) For the purpose of compliance with this AD, an equivalent procedure may be approved by the Chief of the FAA Engineering and Manufacturing Branch of any FAA region.

The manufacturer's specifications and procedures identified and described in this directive are 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 these documents from the manufacturer may obtain copies upon request to Flug Und Fahrzeugwerke AG, CH-9422 Staad SG, Switzerland. These documents may be examined at FAA Headquarters, Room 916, 800 Independence Avenue, SW., Washington, D.C. 20591.

This amendment becomes effective October 22, 1981, as to all persons except those persons to whom it was made immediately effective by telegraphic AD T81-12-51, issued June 10, 1981, which contained this amendment.

FOOTER: