Airworthiness Directive · Amendment 39-13769 · Bombardier Model DHC-8-400, -401, and -402 Airplanes
Bombardier Model DHC-8-400, -401, and -402 Airplanes
Model DHC-8-400, -401, and -402 airplanes; serial numbers 4005, 4006, 4008 through 4015 inclusive, and 4018 through 4052 inclusive; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Bombardier Model DHC-8-400, -401, and -402 airplanes. This AD requires an inspection to determine the serial number of the spoiler lift dump valves installed on the inboard and outboard spoilers, and replacement of certain spoiler lift dump valves. This AD also provides for revising the airplane flight manual to include performance penalties, which allows the replacement of affected spoiler lift dump valves to be deferred. This action is necessary to prevent failure of the ground spoilers to deploy on the ground, which could result in overrunning the end of the runway in the event of a rejected takeoff. This action is intended to address the identified unsafe condition.
To prevent failure of the ground spoilers to deploy on the ground, which could result in overrunning the end of the runway in the event of a rejected takeoff, accomplish the following:
(a) Within 45 days after the effective date of this AD, perform a one-time inspection of the spoiler lift dump valves on the inboard and outboard spoilers to determine the serial number, per Bombardier Service Bulletin 84-27-12, Revision “A,” dated October 23, 2003.
(1) For any spoiler lift dump valve with a serial number from 5164 through 5264 inclusive or 5267 through 5279 inclusive, accomplish paragraph (b) of this AD.
(2) For any spoiler lift dump valve with a serial number outside the ranges specified in paragraph (a)(1) of this AD, no further action is required by this paragraph.
(b) For any spoiler lift dump valve with a serial number from 5164 through 5264 inclusive or 5267 through 5279 inclusive: Accomplish paragraph (b)(1) or (b)(2) of this AD.
(1) Except as provided by paragraph (b)(2) of this AD: Before further flight after the inspection required by paragraph (a) of this AD, replace the affected spoiler lift dump valve with a new or serviceable valve that has a serial number outside the range specified in paragraph (a)(1) of this AD, or with a valve having a serial number with the suffix “A,” which indicates that the valve has been modified to correct the defect. Do this replacement per Bombardier Service Bulletin 84-27-12, Revision “A,” dated October 23, 2003.
Note 1: Bombardier Service Bulletin 84-27-12, Revision “A,” dated October 23, 2003, refers to Parker Service Bulletin 395800-27-229, dated September 11, 2001, as an additional source of service information for accomplishing the replacement of the spoiler lift dump valves. The Parker service bulletin is included within the Bombardier service bulletin.
(2) Do paragraphs (b)(2)(i) and (b)(2)(ii) of this AD.
(i) Before further flight after the inspection required by paragraph (a) of this AD, revise the Limitations section of the de Havilland DHC-8-400 airplane flight manual (AFM) to include the information on performance penalties included in Table 1 of this AD. This may be accomplished by inserting a copy of this AD into the AFM.
| Accelerate—Stop Distance | ||
| Flap 5° | Increase 2% | (Figures 5-5-4 and 5-5-5). |
| Flap 10° | Increase 2% | (Figures 5-5-9 and 5-5-10). |
| Flap 15° | Increase 3% | (Figures 5-5-14 and 5-5-15). |
| Landing Distance | ||
| Flap 10° | Increase 3% | (Figures 5-11-1 and 5-11-4). |
| Flap 15° | Increase 5% | (Figures 5-11-2 and 5-11-4). |
| Flap 35° | Increase 11% | (Figures 5-11-3 and 5-11-4). |
(ii) Within 6 months after the effective date of this AD, do paragraph (b)(1) of this AD. Once the requirements of paragraph (b)(1) of this AD have been accomplished, the AFM revision required by paragraph (b)(2)(i) of this AD may be removed from the AFM.
(c) As of the effective date of this AD, no person may install a spoiler lift dump valve having a serial number listed in paragraph (a)(1) of this AD, unless the valve's serial number includes a suffix of “A” to indicate that it has been modified to remove the defect that is the subject of this AD.
(d) Actions accomplished before the effective date of this AD per Bombardier Service Bulletin 84-27-12, dated September 7, 2001; and actions accomplished per Bombardier Service Bulletin 84-27-12, Revision “A,” dated December 12, 2001; are considered acceptable for compliance with the corresponding actions specified in this AD.
(e) In accordance with 14 CFR 39.19, the Manager, New York Aircraft Certification Office, FAA, is authorized to approve alternative methods of compliance for this AD.
(f) Unless otherwise specified in this AD, the actions shall be done in accordance with Bombardier Service Bulletin 84-27-12, Revision “A,” dated October 23, 2003. 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, Inc., Bombardier Regional Aircraft Division, 123 Garratt Boulevard, Downsview, Ontario M3K 1Y5, Canada. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; at the FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, suite 410, Westbury, New York; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.
Note 2: The subject of this AD is addressed in Canadian airworthiness directive CF-2001-44, dated December 3, 2001.
