Quantcast Inspection Procedures-continued - TB-1-1520-237-20-2250004

 

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Parts to be Inspected. - TB-1-1520-237-20-2250003
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TB-1-1520-237-20-225 RCS CSGLD-1-1860(R1) All H-60 Aircraft Main Landing Gear Drag Beam Assembly and Decreased Torque on The Jackpad Nut Manual
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Correction Procedures. - TB-1-1520-237-20-2250005
TB 1--1520--237--20--225
NOTE
If movement of the jackpad occurs, sealant must be removed from lower surface of the jack-
pad/drag beam interface and replaced after the nut is retorqued.
(e) Retorque the retention nut to 45--50 foot--pounds (540--600 inch--pounds).
(f) Apply sealant to nut and immediate area IAW TM 1--1520--237--23, para 3--4--5.1, and
TM 1--1520--250--23, para 3.1.6.1.
NOTE
For this inspection only PR1436GB--2 is permitted as an alternative sealant.
(g) As soon as practicable, but NLT 6 Dec 00, perform the inspection required IAW para-
graph 8a(2) of this message.
(2) If the items listed in paragraph 10a are available:
(a) Remove jackpad bolt from drag beam IAW TM 1--1520--237--23, para 3--4--5, and TM
1--1520--250--23, para 3.1.6. Remove the top and bottom sealing washers using extreme care to avoid
damaging the washers to allow for reuse. Removal of tie down ring from the jackpad bolts is not neces-
sary.
NOTE
TM 1--1520--237--23 and TM 1--1520--23 refer to the sealing washer as a "Washer" the FEDLOG
and TM 1--1520--237--23P and TM 1--1520--23P refer to the sealing washer as "Packing with Re-
tainer".
(b) Inspect sealing washer for serviceability. Replace if the seal is damaged.
(c) Discard the jackpad bolt retention nut.
(d) Clean the drag beam surface within a 2 inch radius of the jackpad bolt holes, top and bot-
tom IAW TM 1--1520--237--23, para 3--4--5.1.1.e and TM 1--1520--250--23, para 3.1.6.1.e. Using a 10X
magnifier inspect the cleaned area and the inside diameter of the jackpad bolt holes for:
(1) Inspect for any evidence of cracks. If a crack is found or suspected, proceed to
NOTE
No cracks allowed.
(2) Inspect for corrosion IAW TM 1--1520--237--23, para 3--3--1, and TM
1--1520--250--23, para 3.1.3. If corrosion is found, proceed to paragraph 9b.
(e) If no cracks or corrosion are found, reinstall the jackpad bolt as follows:
CAUTION
Do not apply touchup paint to the sealant.
NOTE
PR1775 is the required sealant for this inspection.
(1) Using a reduced torque of 45--50 foot--pounds (540--600 inch--pounds), reinstall
the jackpad bolt and washers with a new nut IAW TM 1--1520--237--23, para 3--4--5, and TM
1--1520--250--23, para 3.1.6.
(2) After covering the dust plug with seal compound IAW TM 1--1520--237--23, para
3--4--5.1, and TM 1--1520--250--23, para 3.1.6.1, apply torque stripe to the dust cap and retention
nut.
4

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