Document ID: chunk:federal_register_of_legislation:F2006B07224:body:0:p2
Version: federal_register_of_legislation:F2006B07224
Segment Type: other
Provision Reference: 
Character Range: 3360–6805

bundle in accordance with Fairchild SB 226-24-026, Issued: May 27, 1987:

                Model SA226-T aircraft, serial numbers T249 through T275 inclusive and T277 through T291 inclusive;

                Model SA226-T(B) aircraft, serial numbers T(B)276 and T(B)292 through T(B)417 inclusive;

                Model SA226-AT aircraft, serial numbers ATO25 through ATO74 inclusive; and

                Model SA226-TC aircraft, serial numbers TC209 through TC419 inclusive,

                (d)     For the model and serial number aircraft presented below install new voltage regulators, reroute certain wires, and replace the entire voltage regulator panel assembly in accordance with Fairchild SB 24-018, Issued: October 22, 1980, Revised: January 7, 1981:

                Model SA226-T aircraft, serial numbers T201 through T275 inclusive and T277 through T291 inclusive;

                Model SA226-T(B) aircraft, serial numbers T(B)276 and T(B)292 through T(B)347 inclusive;

                   Model SA226-AT aircraft, serial numbers ATO01 through ATO74 inclusive; and

                   Model SA226-TC aircraft, serial numbers TC201 through TC348.

                   (e)     For the model and serial number aircraft presented below, modify the direct current (DC) generator control system so that it will operate off its respective generator output in accordance with Fairchild SB 22624-031, dated
                   July 27, 1989, or Fairchild SB 227-24-012, Issued: May 4, 1989; Revised: July 27, 1989, as applicable. This includes removing field current and reset resistors, removing the reset and generator relays and associated diodes, installing a 10-amp generator control circuit breaker to the left-hand and right- hand essential bus panels, and replacing the 10-amp generator control circuit breakers in the left-hand and right-hand wheelwells with 15-amp circuit breakers that are wired in series with the generator control circuit breakers.

                      (1)     Model SA226-T aircraft, serial numbers T249 through T275 inclusive and T277 through T291 inclusive;

                      Model SA226-T(B) aircraft, serial numbers T(B)276 and T(B)292 through T(B)417 inclusive;

                      Model SA226-AT aircraft, serial numbers ATO25 through ATO74 inclusive; and

                      Model SA226-TC aircraft, serial numbers TC209 through TC419 inclusive.

                      (2)     Model SA227-TT aircraft, serial numbers TT421 through TT541 inclusive;

                      Model SA227-AT aircraft, serial numbers AT423 through AT695 inclusive; and

                      Model SA227-AC aircraft, serial numbers AC406, AC4 1 5, AC416, AC420 through AC556 inclusive, AC558 through AC705 inclusive, and AC707 through AC733 inclusive.

               Note: FAA AD 97-11-13 Amdt 39-10042 refers.

               Compliance: Unless already accomplished to be incorporated within the next 2,000 hours time-in- service after the effective date of this AD.

               This airworthiness directive becomes effective on 11September 1997.

               Background: FAA has received reports of both generators going off-line during flight on three of the affected aircraft. The actions specified by this AD are intended to prevent failure of both generators during critical phases of flight (such as night operations or in icing conditions), which may result in the loss of control of the aircraft.