Airworthiness Directive · Amendment 39-14041 · Bombardier Model DHC-8-102, -103, -106, -201, -202, -301, -311, and -315 Airplanes
Bombardier Model DHC-8-102, -103, -106, -201, -202, -301, -311, and -315 Airplanes
This AD applies to Bombardier Model DHC-8-102, -103, -106, -201, -202, -301, -311, and -315 airplanes, certificated in any category; serial numbers 003 through 598 inclusive.
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier Model DHC-8-102, -103, -106, -201, -202, -301, -311, and-315 airplanes. This AD requires revising the airplane flight manual to include applicable procedures to follow when the flightcrew receives abnormal indications of airspeed, altitude, or vertical airspeed. This AD also requires modifying the static system. This AD is prompted by a report of a leak in the static pressure system, which could result in loss of the static systems and consequent erroneous data displayed on the pilot's flight instruments. We are issuing this AD to advise the flightcrew of applicable procedures in the event of abnormal indications of airspeed, altitude, or vertical airspeed; and to prevent leaks in the static system, which could result in the loss of critical flight information that could result in reduced controllability of the airplane or controlled flight into terrain.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 10 days after the effective date of this AD, revise the Normal and Abnormal Procedures sections of the applicable de Havilland Dash 8 Flight Manual to include the following statement in paragraph 4.11.1 of 4.11 Pitot—Static and Stall Warning System Failures. This may be done by inserting a copy of this AD into the applicable flight manual.
1. Appropriate STATIC SOURCE selector—ALTERNATE. If switching the STATIC SOURCE selector to ALTERNATE does not correct the abnormal indications:
2. Rely on the flight instruments on the opposite side and land as soon as practicable.”
Note 1: When a statement identical to that in paragraph (f) of this AD has been included in the general revisions of the applicable flight manual, the general revisions may be inserted into the flight manual, and the copy of this AD may be removed from the flight manual.
For airplanes having serial numbers 003 through 590 inclusive: Within 24 months after the effective date of this AD, modify the static system in accordance with Part A and Part C of the Accomplishment Instructions of Bombardier Service Bulletin 8-34-221, Revision ‘A,’ dated September 15, 2003.
(h) For airplanes having serial numbers 591 through 598 inclusive: Within 24 months after the effective date of this AD, modify the static system in accordance with Part B and Part C of the Accomplishment Instructions of Bombardier Service Bulletin 8-34-221, Revision ‘A,’ dated September 15, 2003.
(i) Modifications done before the effective date of this AD in accordance with Bombardier Service Bulletin 8-34-221, dated May 27, 2003, are acceptable for compliance with the applicable modifications specified in paragraphs (g) and (h) of this AD.
