TB 1-1520-238-20-113
Inspection Procedures.
a. Perform an initial inspection of each main rotor blade as follows:
(1) Check main rotor blade for cracks and voids in accordance with the following procedures:
(a) Check the entire surfaces of the main rotor blade upper/lower and trailing edge for
chordwise and spanwise cracks visually and by wiping upper and lower surfaces of the blade and the
top and bottom of trailing edge with cloth. Snagging of cloth indicates a crack. No cracks allowed.
Use cloth (cheesecloth) listed in paragraph 10.c. to conduct this inspection.
(b) If cracks are suspected, examine with a 10X magnifying glass for evidence of
crack(s).
(2) Pay particular attention to main rotor blades trailing edges for cracking.
(3) If cracks are found, correct in accordance with paragraph 9.
b. Perform the recurring inspections of each main rotor blade as follows:
(1) The inspection procedures in accordance in accordance with paragraph 8.a. of this
message will be completed every 10 flight hours/14 days. ULLS-A units will use an 800 inspection
number for this special inspection.
(2) Prior to each flight, including through flights, visually check the entire length of each main
rotor blade upper and lower surface trailing edge for chordwise and spanwise cracks.
Correction Procedures.
a. If cracks are found, repair in accordance with TM 1-1520-238-23.
b. If cracks are beyond repairable limits in the TM, dispose of in accordance with paragraph
c. If there is any evidence of chordwise cracking on the main rotor blade, submit CAT I QDR
and notify the technical POC listed in paragraph 16.a.
d. Commanders shall ensure that flight crews and maintenance personnel are briefed on correct
methods of inspecting for blade damage and the importance of completing thorough blade inspections.
a. Parts Required. Items cited in paragraph 7 may be required for the replacement of defective
items.
b. Requisitioning Instructions. Requisition replacement parts using normal supply procedures.
All requisitions shall use project code (CC 57-59) "XD4" (x-ray--delta--four).
NOTE
Project code "XD4" is required to track and establish a database
of stock fund expenditures incurred by the field as a result of
SOF actions.
c. Bulk and Consumable Materials.
NSN
Nomenclature
Cloth (50 lb.)
3
Previous Page
