AD 71-04-04

71-04-04 CANADAIR AIRCRAFT: Amdt. 39-1156. Applies to all CL-215-1A10 airplanes certificated in all categories.

Compliance required as indicated.

To prevent hazards in flight associated with fatigue failure of water door tension rod, P/N 215-26058-12, accomplish either (a) or (b):

(a) Before further flight, replace water door tension rods, P/N 215-26058-12, which have accumulated a maximum of 700 water drops and at each 700 water drops thereafter, with unused parts of the same part number or with equivalent unused parts approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. For the purpose of this Airworthiness Directive, a water drop is defined as the operation of the water door mechanism with the tanks fully or partially filled, and does not include operations performed for checking the mechanism with the water tanks empty.

(b) Before further flight, replace water door tension rods, P/N 215-26058-12, which have accumulated a maximum of 700 water drops, with water door tension rods P/N 215-26105-3 or with equivalent new parts approved by the Chief, Engineering & Manufacturing Branch, FAA Eastern Region.

(c) The replacement schedule specified in (a) may be decreased by the Chief, Engineering & Manufacturing Branch, FAA Eastern Region, upon receipt of substantiating data submitted through an FAA Maintenance Inspector.

This amendment is effective February 25, 1971.