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2016-25-16: We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2E25 (Regional Jet Series 1000) airplanes. This AD was prompted by reports of two cases where the main landing gear (MLG) failed to fully extend; it was determined that interference between the MLG door and the MLG fairing seal prevented the MLG door from opening fully. This AD requires repetitive inspections of the MLG fairing, fairing seal, door, and adjacent structures; and replacement or repair of affected parts and fasteners, or removal of the MLG door, if necessary. This AD also requires installation of a safety guide in the MLG fairing and an increase of the spacing between the MLG door and the fairing, which would terminate the repetitive inspections. We are issuing this AD to address the unsafe condition on these products.
86-15-05: 86-15-05 DEHAVILLAND AIRCRAFT OF CANADA, LTD.: Amendment 39-5357. Applies to Model DHC-7 airplanes, serial numbers 1 through 14 inclusive, certificated in any category. Compliance is required within 60 days after the effective date of this AD, unless previously accomplished. To assure proper crew warning in the event of the loss of the 400 Hz AC electrical power system, accomplish the following: 1. Modify the 400 Hz AC system in accordance with DeHavilland Service Bulletin 7-24-13, Revision A, dated September 10, 1982. 2. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM-113, FAA, Northwest Mountain Region. 3. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and/or modifications required by this AD. All persons affected by this directive, who have not already received the appropriate service bulletin from the manufacturer, may obtain copies upon request to DeHavilland Aircraft of Canada, Ltd., Downsview, Ontario M3K 1Y5, Canada. This document may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington. This amendment becomes effective September 4, 1986.
89-03-16: 89-03-16 CESSNA: Amendment 39-6162. Final copy of Priority Letter AD issued February 7, 1989. Applicability: Model 650 series airplanes, serial numbers 650-0067 through 650-0165, certificated in any category. Compliance: Required as indicated, unless already accomplished. To prevent non-restorable loss of all avionics power, accomplish the following: A. Within 25 hours time-in-service after the effective date of this Airworthiness Directive (AD), perform an operational check of the avionics bus relays, in accordance with the Accomplishment Instructions of Cessna Alert Service Letter SLA650-24-14, dated February 3, 1989. If the wiring of the avionics bus relays is not correctly installed, prior to further flight, modify that wiring in accordance with the referenced service letter. B. Within 5 days after accomplishing the check required by paragraph A., above, submit a report, in writing, of any incorrectly installed avionics bus relay wiring identified,to: Manager, Wichita Aircraft Certification Office, FAA, Central Region, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209. C. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Wichita Aircraft Certification Office, FAA, Central Region. NOTE: If appropriate, the request should be forwarded through an FAA Principal Maintenance Inspector (PMI) who may add any comments and then send it to the Manager, Wichita Aircraft Certification Office. D. Special flight permits may be issued in accordance with FAR 21.197 or 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. All persons affected by this directive who have not received copies of the service information from the manufacturer, may obtain copies upon request to Cessna Aircraft Company, P.O. Box 7706, Wichita, Kansas 67277. These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or at the FAA, Central Region, Wichita Aircraft Certification Office, 1801 Airport Road, Room 100, Mid- Continent Airport, Wichita, Kansas. This AD was effective earlier to all recipients of Priority Letter AD 89-03-16 issued February 7, 1989. This amendment (39-6162, AD 89-03-16) becomes effective April 5, 1989.
92-25-02: 92-25-02 FOKKER: Amendment 39-8417. Docket No. 92-NM-96-AD. Applicability: All Model F28 Mark 0100 series airplanes, certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent false indications to the crew that the landing gear is not down and locked, accomplish the following: (a) Within 120 days after the effective date of this AD, identify the serial number on the nameplate of the main landing gear downlock actuator, part number 201218001 or 201218002. (1) If the serial number identified on the nameplate is not one of the following serial numbers, no further action is required by this AD: Part Number 201218001 Part Number 201218002 CWDD/DRG/1/88 to CWDD/DRG/20/88 CWDD/DRG/1/88 to CWDD/DRG/19/88 CWDD/DRG/1/89 to CWDD/DRG/25/89 CWDD/DRG/1/89 to CWDD/DRG/32/89 CWDD/DRG/1/90 to CWDD/DRG/42/90 CWDD/DRG/1/90 to CWDD/DRG/34/90 CWDD/DRG/1/91 to CWDD/DRG/13/91 CWDD/DRG/1/91 to CWDD/DRG/10/91 (2) If the serial number identified on the nameplate is one of the affected serial numbers specified in paragraph (a)(1) of this AD, and if "F100-32-45" is identified on the nameplate, no further action is required by this AD. (3) If the serial number identified on the nameplate is one of the affected serial numbers specified in paragraph (a)(1) of this AD, and if "F100-32-45" is not identified on the nameplate, prior to further flight, replace the downlock actuator with one that has "F100-32-45" identified on the nameplate, or one that is not one of the affected serial numbers specified in paragraph (a)(1) of this AD, in accordance with Fokker Service Bulletin SBF100-32-052, dated May 1, 1991. (b) As of the effective date of this AD, no main landing gear downlock actuator, part number 201218001 or 201218002, having a serial number that is specified in paragraph (a)(1) of this AD, shall be installed on any airplane unless "F100-32-045" is identified on the nameplate. (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, Standardization Branch, ANM-113, 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, Standardization Branch. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch. (d) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (e) The replacement shall be done in accordance with Fokker Service Bulletin SBF100-32- 052, dated May 1, 1991. 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 Fokker Aircraft USA, Inc., 1199 North Fairfax Street, Alexandria, Virginia 22314. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; 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, 1992.
73-13-08: 73-13-08 CESSNA: Amdt. 39-1674. Applies to Model 421B (Serial Numbers 421B0260 through 421B0346) airplanes having AiResearch TH0871 turbochargers with serial number prefixes BC or later installed and to any Model 421B airplane prior to Serial Number 421B0260 on which new turbochargers with serial number prefixes BC and later or remanufactured turbochargers with serial number prefixes BCR and later have been installed. NOTE: Re turbochargers, the first letter B indicates the year of manufacture, i.e., 1972. The second letter C, D, E, etc., indicates the month of manufacture. Therefore, prefix BD is later than BC, BE is later than BD, etc. An R following the dating letters indicates the unit has been remanufactured. Turbochargers affected are those manufactured or remanufactured subsequent to July 1, 1972. Compliance: Required as indicated, unless already accomplished. To prevent loss of engine oil, within the next 25 hours' time in service after the effective date of this AD, install a check valve in the crankcase breather oil separator line in accordance with instructions set forth in Cessna Service Letter No. ME73-10, dated May 18, 1973, or later FAA-approved revision, or any equivalent modification approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region. This amendment becomes effective June 27, 1973.
2016-25-17: We are adopting a new airworthiness directive (AD) for certain Saab AB, Saab Aeronautics Model SAAB 2000 airplanes. This AD was prompted by an occurrence that was reported of rudder pedal restriction on a SAAB Model 2000 airplane with the large potable water system (LPWS) installed, equipped with in-line heaters. This AD requires installation of shrinkable tubes on the water piping of the basic potable water system (BPWS). We are issuing this AD to address the unsafe condition on these products.
2023-18-09: The FAA is superseding Airworthiness Directive (AD) 2023-04- 16, which applied to certain Dassault Aviation Model FALCON 900EX airplanes. AD 2023-04-16 required revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. Since the FAA issued AD 2023-04- 16, the FAA has determined that new or more restrictive airworthiness limitations are necessary. This AD continues to require the actions in AD 2023-04-16, and also requires revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
2023-09-05: The FAA is adopting a new airworthiness directive (AD) for all Airbus SAS Model A300 B4-600, B4-600R, and F4-600R series airplanes, and Model A300 C4-605R Variant F airplanes (collectively called Model A300-600 series airplanes). This AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. This AD requires revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
2016-25-06: We are adopting a new airworthiness directive (AD) for all The Boeing Company Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), and DC-9-87 (MD-87) airplanes; and Model MD-88 airplanes. This AD was prompted by a report of fatigue cracking in a rear spar lower cap of the horizontal stabilizer. This AD requires repetitive inspections for cracking of the rear spar lower caps of the horizontal stabilizer, post-modification and post-repair inspections, and corrective actions if necessary. This AD also provides an optional terminating fatigue life enhancement modification. We are issuing this AD to address the unsafe condition on these products.
2023-02-13: The FAA is superseding Airworthiness Directive (AD) 2020-21- 19, which applied to certain Dassault Aviation Model FALCON 900EX airplanes. AD 2020-21-19 required revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. This AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. This AD continues to require the actions in AD 2020-21-19, and also requires revising the existing maintenance or inspection program, as applicable, to incorporate additional new or more restrictive airworthiness limitations; as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.