Airworthiness directives › 2004-01-10
AD 2004-01-10 Airworthiness Directives; Eurocopter Deutschland Model MBB-BK-117 A-1, A-3, A-4, B-1, B-2, and C-1 Helicopters
Models named: MBB-BK-117 A-1, A-3, A-4, B-1, B-2, C-1. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
Model MBB-BK-117 A-1, A-3, A-4, B-1, B-2, and C-1 helicopters with either: (a) Tail rotor (TR) transmission, part number (P/N) 4639003001 or 4639003007, with serial number (S/N) 900 through 932 plus all S/Ns overhauled or repaired after July 15, 2001, and bearing, P/N 4639310006, S/N 3246 through 3598; or (b) Intermediate (INT) gearbox, P/N 4639002001 or 4639002005, with S/N 902 through 928 plus all S/Ns overhauled or repaired after July 15, 2001, and bearing, P/N 4639310006 with S/N 3246 through 3598.
Compliance
Required as indicated, unless accomplished previously. To prevent cracking, separation of the bearing cage, failure of a bearing, failure of the TR transmission or INT gearbox, and subsequent loss of control of the helicopter, accomplish the following: (a) Until you do paragraph (b) of this AD, before the first flight of each day, inspect the magnetic plugs of the TR transmission and INT gearbox for metal particles deposits by reference to Figure 1 of this AD. ER07JA04.004 (1) If you find a small amount of fine fuzz as shown in “Pos. A” of Figure 1 of this AD, clean the magnetic plug and reinstall it after ensuring that the O-ring is correctly positioned and there is no other damage. (2) If you find an amount of fuzz as depicted in “Pos. B” or “Pos. C” or metal chip(s) as depicted in “Pos. D” through “Pos. G” or a combination of both fuzz and chips, do paragraph (b) of this AD. (b) No later than February 23, 2004, replace bearing, P/N 4639310006 with S/N 3246 through 3598, with an airworthy bearing or replace the affected TR transmission or INT gearbox with an airworthy TR transmission and INT gearbox that does not contain the affected bearing. (c) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Contact the Safety Management Group, Rotorcraft Directorate, FAA, for information about previously approved alternative methods of compliance. (d) This amendment becomes effective on January 22, 2004. Note: The subject of this AD is addressed in Luftfahrt-Bundesamt (Federal Republic of Germany) AD 2003-161, dated April 29, 2003. Issued in Fort Worth, Texas, on December 31, 2003. David A. Downey, Manager, Rotorcraft Directorate, Aircraft Certification Service. [FR Doc. 04-267 Filed 1-6-04; 8:45 am] BILLING CODE 4910-13-P
Read the original on the Federal Register →
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1