Airworthiness Directive · Amendment 39-12730 · Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 and -145 Series Airplanes
Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 and -145 Series Airplanes
Superseded. A later AD replaced this one: AD 2002-14-25. Comply with the one in force.
Model EMB-135 and -145 series airplanes; certificated in any category; serial numbers 145004 through 145189 inclusive; 145191 through 145362 inclusive; 145364 through 145373 inclusive; 145375 through 145411 inclusive; 145413 through 145461 inclusive; 145463 through 145468 inclusive; 145470; 145472 through 145482 inclusive; 145485, 145486, and 145488; 145490 through 145494 inclusive; 145496 through 145498 inclusive; 145500 through 145502 inclusive; 145504 and 145507; 145508 through 145512 inclusive; 145514, 145515, 145517, and 145518.
This amendment adopts a new airworthiness directive (AD) that is applicable to certain EMBRAER Model EMB-135 and -145 series airplanes. This action requires repetitive inspections (tests) of the actuator clutches of the primary and backup pitch trim systems of the horizontal stabilizer for proper pitch trim indications, and replacement of the actuator, if necessary. This action is necessary to prevent loss of pitch trim command during the takeoff and climb phase of flight due to improper set point of the actuator clutches, which could result in high pitch control forces and consequent reduced controllability of the airplane. This action is intended to address the identified unsafe condition.
