Correction Procedures. - TB-1-1520-237-20-2130003

TB 1-1520-237-20-213

b. Inspect both crossfeed fuel hose assemblies to verify that the appropriate part numbers are

installed as specified in TM 1-1520-237-23P (1 NOV 98), or TM 1-1520-250-23P-2 (30 AUG 96).

Hose assembly (P/N SS30DN15F206000 (20 inches long) should be installed on the number one

crossfeed line (breakaway valve for this line is on the left hand side of the aircraft) and hose P/N

SS30DN15F242000 (24 inches long) should be installed on the number two crossfeed line

(breakaway valve for this line is on the right hand side of the aircraft). If the hose assemblies are

in any other configuration on the aircraft, contact the technical point of contact in paragraph 16A

before continuing with the inspection.

c. Implement the paragraph 9C change to PMS-1.

d. If the valve has over 1500 hours, check for leakage as follows:

(1) With aircraft outdoors, apply external or APU Electrical power.

(2) If environmentally required, place catch pans under #2 engine fuel drain.

(3) Place #2 engine fuel selector to crossfeed. #1 engine fuel selector remains at off.

(4) Turn on #1 fuel boost pump.

(5) Place #2 engine power control lever to lockout until fuel flows from drain.

(6) Return power control levers to off, fuel selectors to off, boost pump to off, and remove

electrical power.

(7) Inspect #2 crossfeed breakaway valve for leaks. Verify by wiping hand/rag on bottom

side of valve. No leakage is allowed.

e. If leakage is found, replace the valve immediately using the removal and installation procedures in

paragraph 9. Dispose of defective valve IAW paragraph 10D. Report IAW paragraph 14B.

f. If no leakage is found, annotate the appropriate records to replace the number two crossfeed

breakaway valve IAW the following schedule using the removal and installation procedures in

paragraph 9.

(1) If the valve has 2000 hours or more, annotate the DA Form 2408-13-1 to replace at the

next scheduled 100 hour inspection or PMS II, whichever occurs first. Report results IAW

paragraph 14B.

(2) If the valve has more than 1000 hours or more, annotate the DA Form 2408-13-1 to

replace at the next scheduled 100 hour inspection or PMS II, whichever occurs first.

Report results IAW paragraph 14B.

9. Correction Procedures.

a. Remove: Use this procedure in lieu of the removal procedure provided in TM 1-1520-237-23,

paragraph 10-4-26.1 or TM 1-1520-250-23, paragraph 10.4.11.1 and applies to both the left and

right hand fuel breakaway valves.

(1) Turn off all electrical power.

(2) Open engine cowling.

(3) Remove oil cooler compartment left/right side access door from helicopter (TM 1-1520-

237-23, paragraph 2-4-122, or TM 1-1520-250-23, paragraph 2.34)

(4) Loosen, but do not remove, clamps where the number one and number two crossfeed

fuel hoses cross.

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