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Airworthiness directives › 99-21-25

AD 99-21-25 Airworthiness Directives; Eurocopter France Model SE.3160, SA.315B, SA.316B, SA.316C, and SA.319B Helicopters

1999-10-29
1999-10-14
39-11370
99-SW-29-AD
Airframe
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Models named: SE.3160, SA.315B, SA.316B, SA.316C, SA.319B. Read the applicability below — it usually turns on serial or part numbers too.

Applicability*9

Model SE.3160, SA.315B, SA.316B, SA.316C, and SA.319B helicopters with a main gearbox, all part numbers, not modified in accordance with MOD 072241, installed, certificated in any category. Note 1: This AD applies to each helicopter identified in the preceding applicability provision, regardless of whether it has been otherwise modified, altered, or repaired in the area subject to the requirements of this AD. For helicopters that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (d) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.

Compliance

Required as indicated, unless accomplished previously. To detect a condition that could cause failure of a bevel wheel gear attachment bolt (bolt) and damage to the main gearbox (MGB), resulting in loss of drive to the main rotor and subsequent loss of control of the helicopter, accomplish the following: (a) Prior to further flight and thereafter prior to the first flight of each day, inspect the MGB magnetic plug for metal particles. If metal particles are found, comply with the instructions in the applicable maintenance manual. (b) At intervals not to exceed 25 hours time-in-service, inspect the MGB oil filter for metal particles. If metal particles are found, comply with the instructions in the applicable maintenance manual. Note 2: Work Card 5.41.202 pertains to the subject of this AD. (c) Modification of the MGB by MOD 072241 is terminating action for the requirements of this AD. (d) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Regulations Group, Rotorcraft Directorate. Operators shall submit their requests through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Regulations Group, Rotorcraft Directorate. Note 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Regulations Group, Rotorcraft Directorate. (e) Special flight permits are prohibited. (f) This amendment becomes effective on October 29, 1999. Note 4: The subject of this AD is addressed in Direction Generale De L'Aviation Civile (France) AD 98-304-058(A) for Model SE.3160, SA.316B, SA.316C, and SA.319B helicopters, and AD 98-303- 041(A) for Model SA.315B helicopters, both dated July 29, 1998. Issued in Fort Worth, Texas, on October 5, 1999. Mark R. Schilling, Acting Manager, Rotorcraft Directorate, Aircraft Certification Service. [FR Doc. 99-26711 Filed 10-13-99; 8:45 am] BILLING CODE 4910-13-P

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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