TB 1--1520--240--20--146
(2) Clear entries required in accordance with CH-47-02-03, paragraph 1a (1) and/or 8a (1) (b)
from the DA Form 2408-13-1.
b. Aircraft in Maintenance Facility --
(1) Aircraft in AVUM, AVIM, or Depot -- Same as paragraph 1a.
(2) Aircraft at Contractor Facility --Boeing will inspect DD250 aircraft prior to those aircraft depart-
ing for ferry to final destination.
c.
Aircraft in Transit -- Same as paragraph 1a.
d. Maintenance Trainers (Category A and B) -- Comply no later than 25 January 2004.
e. Component/Parts in Stock at All Levels (Depot and Others) including War Reserves -- Upon receipt
of this Technical Bulletin, Depot and Materiel Activity Commanders will ensure the materiel condition tags of
all items in all condition codes listed in paragraph 6 are annotated to read: "CH-47-02-05 (TB
1-1520-240-20-146), inspection of the tie bar assembly not complied with."
(1) Wholesale Stock -- N/A.
(2) Retail Stock -- Upon receipt of this message, Commanders and Facility Managers maintain-
ing retail stock at installation level and below shall contact the supported aviation unit to perform the proce-
dures required in accordance with paragraphs 8 and 9 on suspect materiel. Dispose of discrepant materiel
in accordance with paragraph 10. Report compliance with this Technical Bulletin in accordance with para-
f. Components/Parts in Work (Depot Level and Others) --Depot and other Maintenance Activity Com-
manders will ensure items in paragraph 6 are not issued until they are in compliance with this Technical Bulle-
tin.
Task/Inspection Suspense Date.
a. Complete the procedures in accordance with paragraph 8a no later than 27 March 2002.
b. Complete the inspection in accordance with paragraph 8b at the next rotor head removal, but no later
than the next phase inspection or 25 January 2004, whichever occurs first.
4.
Summary of the Problem.
a. CH--47--02--03 was issued on 24 Janaury 2002 requiring inspection of the tie bar assembly and rotor
tachometer. With regard to the tie bar inspections, the intent of the message was to inspect for cracked plates
and deformation of washers only. Scores, scratches, buckling/separation of plates, and other minor installa-
tion damage are not grounds for failing this special inspection. The 1200 hour operating time special inspec-
tion will still be required. At the time the 1200 hour operating time special inspection is due, all tie bars that
fail the inspection criteria of TM 55-1520-240-23, Task 5-23.1.1 (H-47D/F), or TM 1-1520-252-23, Task 5-31,
(MH-47E), will require replacement.
b. Manpower/Downtime and Funding Impacts -- see paragraph 12.
c.
The purpose of this Technical Bulletin is to --
(1) Revise the tie bar inspection procedures required by CH-47-02-03 (TB 1-1520-240-20-141).
(2) Add additional manual changes for tie bar assembly inspection criteria to paragraph 12e.
5.
End Items to be inspected. All H--47 series aircraft.
2
Previous Page
