TB 1--1520--237--20--227
(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.
b. The recurring inspections of each main landing gear drag beam will occur as follows:
(1) Prior to each flight, to include pre--flight, through flights, and post flight, wipe clean the top and
bottom of left and right main landing gear drag beams within a 2 inch radius of drag beam jackpad bolt/tie
down.
(2) Check for cracks radiating from the jackpad bolt/tie down holes.
NOTE
No cracks allowed.
(3) If a crack is found or suspected:
(a) Enter a Red Horizontal Dash //--// status symbol on the DA Form 2408--13--1 with the fol-
lowing statement: "Fluorescent penetrant inspection required IAW TB 1--1520--237--20--227."
c.
f a crack is found or suspected:
(1) Perform a fluorescent penetrant inspection to confirm the existence of the crack.
(3) If a crack is not found after application of the fluorescent penetrant inspection, continue with
the inspection procedures IAW paragraph 8a or 8b as applicable.
d. At the next scheduled and each subsequent 90 day corrosion prevention inspection, apply corrosion
prevention compound (CPC) over the sealant. The preferred CPC for this inspection is listed in para 10c of
this message. An approved alternate is located in TM 1--1520--237--23, Appendix D, Item 112.
Correction Procedures.
a. If cracks are found:
(1) Change status of aircraft to a Red //X//.
(2) Immediately remove aircraft weight off of that main landing gear.
(3) Replace discrepant drag beam IAW with normal TM procedures as modified IAW this mes-
sage.
b. If corrosion is found, clean/repair IAW TM 1--1520--237--23, para 3--3--1, or TM 1--1520--250--23,
para 3.1.3.
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