84-16-01 MESSERSCHMITT-BOLKOW-BLOHM: Letter issued August 7, 1984. Applies to MBB Model BO 105 series helicopters certificated in all categories that are equipped with the following tail rotor blades:
105-31743 Serial Nos.: 115, 118, 219, 224, 387, 395, 581, 608, 615, 650.
105-31744 (Modification of 105-31742) Serial Nos.: 64, 86, 124, 127, 130, 131, 143, 147, 152, 158, 179, 180, 210, 211, 216, 217, 219, 220, 240, 246, 256, 262, 265, 266, 267, 269, 295, 342, 344, 372, 383, 390, 394, 414, 425, 433, 437, 438, 442, 444, 461, 467, 489, 491, 495, 499, 504, 506, 514, 516, 517, 528, 538, 543, 552, 556, 588, 591, 596, 601, 603, 607, 846, 936, 1065, 1174, 1175, 1199, 1234, 1235, 1237, 1270, 1300.
Compliance required as indicated.
(A) Before further flight, perform a visual check of each tail rotor blade tip area (approximately 100MM (4 inches) from end cap inward) for cracks.
(B) Repeat the check of Paragraph (A) before each subsequent flight until the affected blades are replaced.
(C) Replace cracked tail rotor blades with serviceable blades before further flight.
(D) The check required by Paragraph (A) of this AD is not considered to be maintenance or preventive maintenance, and may be performed by the pilot, however, the person performing this check shall make an entry in the aircraft maintenance records containing the following information: The name of the person who performed the check, the date the check was accomplished, the signature, certificate number, and kind of certificate held by the person performing the check.
(E) An equivalent method of compliance with this AD may be used when approved by the Manager, Aircraft Certification Division, FAA, Southwest Region, P.O. Box 1689, Fort Worth, Texas 76101.
NOTE: MBB Alert Bulletin No. 23 applies to this inspection.
This airworthiness directive becomes effective upon receipt.