AD 2001-13-02 Airworthiness Directives; Bell Helicopter Textron Canada Model 407 Helicopters

Models named: 407. Read the applicability below — it usually turns on serial or part numbers too.

Model 407 helicopters, serial numbers 53000 through 53194, 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 (b) 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 within 90 calendar days, unless accomplished previously. To assist the pilot in properly identifying a specific warning horn (horn) and prevent an inappropriate pilot response to a horn, which could cause an engine overspeed and subsequent uncommanded reduction to flight-idle engine power, accomplish the following: (a) Remove and replace the following horns and install the specified terminal junctions in accordance with the Accomplishment Instructions in Bell Helicopter Textron Alert Service Bulletin No. 407-97-12, dated October 7, 1997:   Part Name Current Part Number Replacement Part No. (1) FADEC Fail Horn SC648S VSB628CP (2) Low Rotor RPM Horn SC628 SC628N (3) Engine Out Horn SC628P SC628NP (4) Terminal Junction (2) M81714/65-22-11 (b) 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, Rotorcraft Regulations Group, Rotorcraft Directorate, FAA. Operators shall submit their requests through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Rotorcraft Regulations Group. Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Rotorcraft Regulations Group. (c) Special flight permits may be issued in accordance with §§ 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the helicopter to a location where the requirements of this AD can be accomplished. (d) The modification shall be done in accordance with the Accomplishment Instructions in Bell Helicopter Textron Alert Service Bulletin No. 407-97-12, dated October 7, 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 Bell Helicopter Textron Canada, 12,800 Rue de l'Avenir, Mirabel, Quebec JON1LO, telephone (800) 363-8023, fax (450) 433-0272. Copies may be inspected at the FAA, Office of the Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (e) This amendment becomes effective on August 1, 2001. Note 3: The subject of this AD is addressed in Transport Canada (Canada) AD No. CF-98-13, effective August 7, 1998. Issued in Fort Worth, Texas, on June 13, 2001. Eric Bries, Acting Manager, Rotorcraft Directorate, Aircraft Certification Service. [FR Doc. 01-15793 Filed 6-26-01; 8:45 am] BILLING CODE 4910-13-U