AD 97-25-11 Airworthiness Directives; Bombardier Model CL-600-2B16 Series Airplanes Modified in Accordance With Supplemental Type Certificate (STC) SA6003NM

Models named: CL-600-2B16 series. Read the applicability below — it usually turns on serial or part numbers too.

Model CL-600-2B16 series airplanes that have been modified in accordance with Supplemental Type Certificate SA6003NM, certificated in any category. Note 1: This AD applies to each airplane 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 airplanes 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 (c) 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.

Required as indicated, unless accomplished previously. To prevent the circuit breaker on the battery bus from opening during flight, which could result in irreversible loss of engine indicating and fuel quantity systems in the cockpit, accomplish the following: (a) Within 5 days after the effective date of this AD, disable the remote fuel/defuel panel, in accordance with Bombardier Service Bulletin SB TUS-28-20-02-1, dated November 13, 1997. (b) Modification of the remote fuel/defuel panel in accordance with Bombardier Service Bulletin SB TUS-28-20-02, dated November 13, 1997, permits the remote fuel-defuel panel to be enabled, and constitutes terminating action for the requirements of paragraph (a) of this AD. (c) 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, Los Angeles Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Los Angeles ACO. Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Los Angeles ACO. (d) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished. (e) The actions shall be done in accordance with Bombardier Service Bulletin SB TUS-28-20-02-1, dated November 13, 1997; or Bombardier Service Bulletin SB TUS-28-20-02, dated November 13, 1997. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Bombardier Aviation Services, 1255 East Aeropark Boulevard, Tucson, Arizona 85706. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, Transport Airplane Directorate, Los Angeles Aircraft Certification Office, 3960 [[Page 64521]] Paramount Boulevard, Lakewood, California; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (f) This amendment becomes effective on December 23, 1997. Issued in Renton, Washington, on December 1, 1997. Darrell M. Pederson, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 97-31968 Filed 12-5-97; 8:45 am] BILLING CODE 4910-13-U