TB 1--1520--237-20--242
with the following statement. "Fuel line chaffing at APU shroud assembly.
Replace IAW TB
Correction Procedures.
a. If an unauthorized grommet is installed, remove grommet and replace with proper part IAW TM
1-1520-237-23-7, paragraph 15-4-4.1 or TM 1-1520-250-23-5, paragraph 15.3.3.
NOTE
If an unauthorized is installed, the firewall plate assembly (PN 169036-1) may be required during
re-installation. If this part is required and cannot be obtained from supply, contact Technical POC
for further instructions.
b. If fuel lines show signs of chaffing, remove damaged lines and replace with new lines IAW TM
55-2835-208-23 or TM 55-2835-209-23.
10. Supply/Parts and Disposition.
a. Parts required -- Items cited in paragraph 12.c. may be required to replace defective items.
b. Requisitioning instructions -- Requisition replacement parts using normal supply procedures. All
requisitions shall us project code (CC 57-59) "X1J" (X-RAY ONE JULIET).
NOTE
Project code "X1J is required to track and establish a data base of stock fund expenditures in-
curred by the field as a result of message actions.
c.
Bulk and Consumable Materials. N/A.
d. Disposition. Demilitarize/mutilate IAW TM 1-1500-328-23, any part/component which does not
meet inspection criteria.
e. Disposition of Hazardous Material. N/A.
11. Special Tools, and Fixtures Required.. N/A.
a. Category of Maintenance. AVUM. Aircraft downtime will be charged to AVUM maintenance. Report
aircraft non-mission capable maintenance (NMCM) while undergoing inspection and correction IAW this TB.
b. Estimated Time Required.
(1) Time to Complete Inspection -- Total of 1 man-hours using 1 person.
(2) Time For Repair/Replacement --
(a) Total of 2 man-hours using 2 persons.
(b) Total of 1 hour downtime for one end item.
c.
Estimated cost impact to the field.
PART NO./NSN
QTY.
COST EA.
TOTAL
NOMENCLATURE
Grommet, Tube Pass
169037-1
1
2.77
2.77
Plate Assembly, Firewall
169036-1
1
0.77
0.77
Tube Bundle
163180-100
1
9.40
9.40
4720-01-192-4920
Tube Bundle
160374-100
1
8.82
8.82
Fuel Line
3883497-1
1
0.97
0.97
3