When aircraft or individual blades are transferred, to include from contractor facili-
ties, or if local storage facilities are not available, forward all X--rays to the NDT
COE for storage/disposition. See paragraph 8f(2) for mailing address. The trans-
ferring facility/unit will provide the unit address of the gaining unit to the NDT COE
along with the X--rays upon transfer.
(3) X--Rays sent to AMCOM NDT COE will be retained at AMCOM NDT COE. The following
Information will be included with each X--Ray: Aircraft Tail Number, Tail Rotor Blade serial number, current
blade hours, name, address, phone number (commercial and DSN), and e--mail address of person shooting
the X--Ray's. Units with certified Level III radiographers will submit the above information to NDT COE but
retain the X--Rays. X--Rays will be stored IAW TM 1--1500--335--23 Nondestructive Inspection Methods,
a. Paint Crazing/ Cracks Inspection/ Repair Procedure--
Prior to sanding filler material, install masking tape (or equivalent) from the
edge of the filler material inboard ensuring the complete coverage of the root
No sanding of the root fitting is authorized. Sanding of the fitting may cause
damage, which would lead to blade rejection. Do not use power tools.
(1) Hand sand the affected area with 160 to 220 grit sandpaper to remove the topcoat and primer.
Do not remove metal from root fitting or feather edges of doublers.
(2) Solvent wipe the area with isopropyl alcohol. Hand--wipe solvent. Allow to dry.
(3) Inspect for cracks with 10x magnifier. If no crazing/cracks is found, continue to paragraph
There is distinct color difference between filler and adhesive.
(4) If crazing/ cracks are visible, carefully sand filler material using 220/320 grit sandpaper until
crack indication disappears. While sanding stay focused on sanding only on the filler material. Incidental
sanding of spar edges and doubles is acceptable: however it should be kept to a minimum.
(5) Solvent wipe the area with isopropyl alcohol. Hand--wipe solvent. Allow to dry.
(6) Cracks or debonds remaining after removal of filler material is cause for rejection. Cracks
extending into adhesive, delaminated doublers, or corrosion pits on root fitting are not allowed. Submit a CAT
Scrim cloth (mesh like appearance) is embedded in the adhesive underneath the
filler material. The surface of the scrim cloth may give visual indications of craz-