TB 1--1520--237--20--230
(1) Main Rotor Spindle Lugs -- Re--implement the 10 hour / 14 day PMS1 inspection IAW TM
1--1520--237--PMS1 / 250--PMS1.
(2) Main Rotor Expandable Pin -- (ULLS--A units will use "800" inspection for the recurring Ex-
pandable Pin inspection until a change to the PMS1 manual is printed).
(a) Release Expandable Pin handle from the lower nut and raise to the fully open position.
(b) Realign Pin handles and close. Resistance should be felt while moving handle from un-
locked to locked.
(1) If no resistance is felt while moving the handle to the locked position, proceed to para-
graph 9b(2).
(2) If no discrepancies are noted, the inspection is complete.
e. Items in stock -- NDI all Spindles held in stock NLT 4 May 2001, or before installation on aircraft,
whichever occurs first. Correct any discrepant spindle IAW 9a. Any spindles received from DEPOT (whole-
sale) after the initial 120 day period shall be inspected IAW paragraph 8b(2) prior to installation.
9.Correction Procedures.
a. Discrepant Main Rotor Spindle Lug --
(1) If indication of a crack is found during the NDI procedure --
(a) Replace the discrepant spindle, Main Rotor Expandable Pins, and Main Rotor Blade As-
sembly. Do not remove Lug Bushing from the Spindle.
(b) Contact technical POC in paragraph 16a to report results of the inspection. If directed
to do so by the technical POC, submit a Quality Deficiency Report (QDR) for the discrepant component
(2) If cracked / broken Lug is found during an on aircraft visual inspection --
(a) Immediately notify the logistical POC IAW paragraph 16b of the inspection results.
(b) Replace the discrepant spindle, Main Rotor Blade Expandable Pins, and Main Rotor
Blade Assembly.
(c) Contact technical POC in paragraph 16a to report results of the inspection. If directed
to do so by the technical POC, submit a Quality Deficiency Report (QDR) for the discrepant component
b. Main Rotor Blade Expandable Pin --
(a) Change the aircraft status to a red //X//.
(b) Fax the special report of discrepant item IAW paragraph 14f. Contact technical POC IAW
(c) Following analysis of the component by AMCOM Engineering, the logistical POC will con-
tact the unit and provide final disposition instructions.
(d) If additional information regarding Spindle and Main Rotor Blade history is necessary, the
logistical POC will contact the unit POC.
(e) Prior to receipt of disposition instructions, units may choose to replace the affected at-
taching components to return the aircraft to flyable status. Annotate records to reflect the removal and
replacement of the Main Rotor Spindle, Expandable Pin and Blade where the discrepant Expandable Pin
was installed. Hold the removed components pending disposition instructions.
(a) With the handle in the unlocked position, check lower ring to see if it rotates freely around
the pin shaft. If lower ring will not rotate or shows evidence of dirt or contaminants, clean out lower ring.
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