Correction Procedures. - TB-1-1520-237-20-2220003

TB 1--1520--237--20--222

b. For each input module that has 250.0 hours or less time since last installed, check the Equipment

Modification Record (DA Form 2408--5--1) to determine if the input module is in compliance with AMCOM

Engineering Directive (AED) T2881.

(1) For each input module that is in compliance with AED T2881, the inspection is complete and

the red horizontal dash //--// entry will be cleared.

(2) If time since last installed is equal to or less than 250.0 hours, and compliance with AED

T2881 can not be confirmed contact the 2410 Hotline to determine if the input module had been repaired at

CCAD. If repaired at CCAD:

(a) Determine the total time on the input module at the time of repair.

(b) Determine if the accessory drive bevel gear was replaced at the time of repair. A list of

input module serial numbers has been provided to the 2410 Hotline that reflects which input module had

new accessory drive bevel gears installed during repair.

(3) If the bevel gear was not replaced with a new gear during repair of the input module at CCAD,

and the time since repair is equal to or less than 30.0 hours, proceed with the corrective action procedures

(4) If the bevel gear was not replaced with a new gear during repair of the input module at CCAD,

and the time since repair is equal to or greater than 30.1 but less than 250.0 hours proceed to paragraph 9b.

(5) If the time since repair for the input module is equal to or greater than 250.0 hours the inspec-

tion is complete and the Red Horizontal Dash //--// entry will be cleared.

(6) If it is determined the accessory drive bevel gear was replaced with a new gear during repair

of the input module at CCAD, the inspection is complete and the Red Horizontal Dash //--// entry will be

cleared.

(7) If the input module was repaired at CCAD after 30 June 2000, the inspection is complete and

the Red Horizontal Dash //--// entry will be cleared.

(8) If the input module was repaired at a facility other than CCAD, the inspection is complete and

the Red Horizontal Dash //--// entry will be cleared.

Correction Procedures.

NOTE

The correction procedures must be performed separately for each input module.

NOTE

The NR sensor is installed on both input modules on the UH--60L, and on the right input mod-

ule on the UH--60A. In the event of a right input module failure on the UH--60A, the crew can

expect loss of NR signal.

a. For input modules which did not have the accessory drive bevel gear replaced with a new gear when

repaired by CCAD, are not in compliance with AED T2881, and have equal to or less than 30.0 hours time

since repair. Replace the input module prior to the next flight.

b. If an aircraft has two input modules installed which did not have the accessory drive bevel gear re-

placed with a new gear when repaired at CCAD, are not in compliance with AED T2881, and have 30.1 to

250.0 hours time since repair. One of the suspect modules will be replaced prior to the next flight.

c. If an aircraft has one input module installed which does not have the accessory drive bevel replaced

with a new gear when repaired at CCAD, is not in compliance with AED T2881, and had 30.1 to 250.0 hours

time since repair, prior to the next flight make the following entry on the DA Form 2408--13--1. Enter a Circled

Red //X// status symbol with the following statement:

"Aircraft operations restricted IAW TB

1--1520--237--20--222." The following flight restrictions will apply:33