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:DEFAIR MATERIAL CANBERRA ACT AS//DAAP-AF//
:CDRUSARDSG CANBERRA ACT AS//AMXIP-AS//
:ARGENTINE AIR ATTACHE FMS WASHINGTON DC
:EGYPT AF FMS CAIRO EG//ED/MA//
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:CDR160THSOAR FT CAMPBELL KY//AOAV-SI//
:CDRBGAD RICHMOND KY//SIOBG-GC//
:USDAO RABAT MO//AF//
:ODC THE HAGUE NL//AVIATION SAFETY//
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:RNLAF OPERATIONS THE HAGUE NL
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:SAO SINGAPORE SN//AVIATION SAFETY//
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:CDRUSARDSG LONDON UK//AMXSN-UK-SE//
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:UNCLAS
SUBJECT - AVIATION SAFETY ACTION MESSAGE, MAINTENANCE
MANDATORY, RCS CSGLD-1860 (R1), ALL H-47 SERIES AIRCRAFT,
ONE TIME INSPECTION OF LAG DAMPENERS, CH-47-99-ASAM-01,
(TB 1-1520-240-20-106).
NOTE
THIS IS AN AVIATION SAFETY ACTION MESSAGE ISSUED IAW AR 95-1,
CHAPTER 6, 1 SEP 97. THIS MESSAGE HAS NOT BEEN TRANSMITTED TO
UNITS SUBORDINATE TO ADDRESSEES. ADDRESSEES SHOULD IMMEDIATELY
RETRANSMIT THIS MESSAGE TO ALL SUBORDINATE UNITS, ACTIVITIES OR
ELEMENTS AFFECTED OR CONCERNED. THE RETRANSMITTAL SHALL
REFERENCE THE MESSAGE. ACTION ADDRESSES WILL IMMEDIATELY VERIFY
THIS TRANSMISSION TO CDR, AMCOM, ATTN: AMSAM-SF-A (SOF
COMPLIANCE OFFICER).
1. PRIORITY CLASSIFICATION -
A. AIRCRAFT IN USE - UPON RECEIPT OF THIS MESSAGE THE
CONDITION STATUS SYMBOL OF THE CITED AIRCRAFT WILL BE CHANGED TO
A RED HORIZONTAL DASH //-//. THE RED HORIZONTAL DASH //-// MAY
BE CLEARED WHEN THE INSPECTION OF PARA 8 IS COMPLETED. THE
AFFECTED AIRCRAFT SHALL BE INSPECTED AS SOON AS PRACTICAL BUT NO
LATER THAN THE TASK/INSPECTION SUSPENSE DATE. FAILURE TO COMPLY
WITH THE REQUIREMENTS OF THIS MESSAGE WITHIN THE TIME FRAME WILL
CAUSE THE STATUS SYMBOL TO BE UPGRADED TO A RED //X//.
B. AIRCRAFT IN DEPOT MAINTENANCE - AIRCRAFT WILL NOT
BE ISSUED UNTIL COMPLIANCE WITH THIS ASAM HAS BEEN
COMPLETED.
C. AIRCRAFT UNDERGOING MAINTENANCE - SAME AS PARA 1A.
D. AIRCRAFT IN TRANSIT -
(1) SURFACE/AIR SHIPMENT - PRIOR TO FIRST FLIGHT.
(2) FERRY STATUS - INSPECT AT FINAL DESTINATION. THOSE
AIRCRAFT THAT HAVE A DD 250 AND ARE AT BOEING HELICOPTERS WILL
BE INSPECTED PRIOR TO FERRY TO FINAL DESTINATION.
E. MAINTENANCE TRAINERS (CATEGORY A AND B) - COMPLY WITHIN
30 DAYS OF THE DATE TIME GROUP OF THIS MESSAGE.
F. COMPONENT/PARTS IN STOCK AT ALL LEVELS (DEPOT AND
OTHERS) INCLUDING WAR RESERVES - UPON RECEIPT OF THIS MESSAGE
THE MATERIAL CONDITION TAGS OF ALL ITEMS IN ALL CONDITION CODES
LISTED IN PARAGRAPH 6 SHALL BE ANNOTATED TO READ "CH-47-99-ASAM-
01, LAG DAMPENER ADJUSTMENT, NOT COMPLIED WITH".
(1) WHOLESALE STOCK N/A.
(2) RETAIL STOCK - UPON RECEIPT OF THIS MESSAGE
COMMANDERS AND OTHERS MAINTAINING RETAIL STOCK AT INSTALLATION
LEVEL AND BELOW SHALL CONTACT THE SUPPORTED AVIATION UNIT TO
PERFORM THE INSPECTION REQUIRED BY PARAGRAPH 8 AND THE
CORRECTION PROCEDURES OF PARAGRAPH 9 ON DISCREPANT MATERIEL.
DISPOSITION OF DISCREPANT MATERIEL WILL BE IAW PARAGRAPH 10.
G. COMPONENTS/PARTS IN WORK (DEPOT LEVEL AND OTHERS) -
ITEMS LISTED IN PARAGRAPH 6 WHICH ARE IN WORK WILL NOT BE
ISSUED UNTIL COMPLIANCE WITH THIS MESSAGE IS COMPLETE.
2. TASK/INSPECTION SUSPENSE DATE - WITHIN NEXT 10 FLIGHT
HOURS/14 DAYS.
3. REPORTING COMPLIANCE SUSPENSE DATE - NO LATER THAN 3
MAR 99 IAW PARAGRAPH 14A OF THIS MESSAGE.
4. SUMMARY OF PROBLEM -
A. AN INVESTIGATION OF CRACKED ROD ENDS ON BLADE LAG
DAMPENERS WITH ELASTOMERIC BEARINGS REVEALED THAT THE ROD ENDS
HAD BEEN ADJUSTED TO THE LENGTH APPLICABLE TO THE OLDER, TEFLON
ROD END BEARINGS. IMPROPER ADJUSTMENT INCREASES FATIGUE
STRESSES WHICH CAN CAUSE THE BANJO PORTION OF THE ROD END
ASSEMBLY TO CRACK. THE LAG DAMPENERS WERE NOT PROPERLY
IDENTIFIED BY PART NUMBER 114H6800-11 AS REQUIRED UPON
APPLICATION OF MWO 1-1520-240-50-64 OR UPON OTHER MAINTENANCE
ACTION. THE MAINTENANCE MANUALS REQUIRE DIFFERENT ADJUSTMENT
LENGTHS FOR THE 9 AND 11 LAG DAMPENERS. WITHOUT THE CORRECT
PART NUMBER IDENTIFIED ON THE PART, INCORRECT ADJUSTMENT LENGTHS
MAY HAVE BEEN APPLIED TO THE LAG DAMPENERS.
B. FOR MANPOWER/DOWNTIME AND FUNDING IMPACTS SEE PARA 12.
C. THE PURPOSE OF THIS MESSAGE IS TO:
(1) PERFORM A ONE-TIME INSPECTION OF LAG DAMPENERS WITH
ELASTOMERIC BEARINGS FOR IMPROPER ADJUSTMENT.
(2) EMPHASIZE THAT THE CORRECT ROD END ADJUSTMENT IS
APPLIED DURING MAINTENANCE ACTIONS OF ALL DAMPENERS.
5. END ITEMS TO BE INSPECTED - ALL CH-47D, MH-47D, AND MH-47E
AIRCRAFT.
6. ASSEMBLY COMPONENTS TO BE INSPECTED -
NOMENCLATURE PART NO. NSN
LAG DAMPENER ASSEMBLY 114H6800-5 1650-01-106-9510
LAG DAMPENER ASSEMBLY 114H6800-9 1650-01-315-1725
LAG DAMPENER ASSEMBLY 114H6800-11 1650-01-371-2475
7. PARTS TO BE INSPECTED N/A.
8. INSPECTION PROCEDURES -
A. PREPARE AIRCRAFT FOR SAFE GROUND MAINTENANCE.
B. INSPECT EACH OF THE SIX (6) ROTOR LAG DAMPENER
ASSEMBLIES FOR OUTBOARD ELASTOMERIC ROD END BEARINGS. IF THE
DAMPENER HAS TEFLON BEARINGS ON BOTH ENDS AND IS IDENTIFIED AS
114H6800-5 IT IS SERVICEABLE. NO FURTHER ACTION IS REQUIRED FOR
THIS DAMPENER ASSEMBLY.
NOTE
THE FOLLOWING ARE APPROVED DAMPENER BEARING
CONFIGURATIONS. THESE CONFIGURATIONS CAN BE
MIXED ON ROTOR HEADS.
INBOARD BEARINGS OUTBOARD BEARINGS
ELASTOMERIC ELASTOMERIC
ELASTOMERIC TEFLON
TEFLON ELASTOMERIC
TEFLON TEFLON
C. INSPECT EACH LAG DAMPENER ASSEMBLY WITH OUTBOARD
ELASTOMERIC ROD END BEARINGS TO DETERMINE IF A 1/4 INCH THICK
JAM NUT IS INSTALLED. IF A 1/4 INCH THICK JAM NUT IS INSTALLED
ON THE ELASTOMERIC ROD END BEARING REFER TO PARAGRAPH 8D BELOW.
IF A 1/2 INCH THICK JAM NUT IS INSTALLED ON THE ELASTOMERIC ROD
END BEARING, THE LAG DAMPENER IS UNSERVICEABLE. REFER TO
PARAGRAPH 9A AND 9B FOR CORRECTION PROCEDURES.
D. IF THE 1/4 INCH THICK JAM NUT IS INSTALLED ON THE
ELASTOMERIC BEARING, MEASURE THE DISTANCE FROM THE ROD END TO
THE NOTCHED END OF THE PISTON IAW TM 55-1520-240-23-4, TASK 5-
89, PARAGRAPH 2. THIS IS DIMENSION "A".
NOTE
MH-47E USERS MAY USE TM 55-1520-240-23-4 TO
PERFORM THIS INSPECTION SINCE IT ALLOWS THE
MEASUREMENT TO BE TAKEN WITHOUT REMOVING THE
BOLT.
E. IF DIMENSION "A" IS BETWEEN 3.345 INCH AND 3.435 INCH
THE LAG DAMPENER IS IMPROPERLY ADJUSTED AND IT IS UNSERVICEABLE.
REFER TO PARAGRAPHS 9A AND 9B FOR CORRECTION PROCEDURES.
WARNING
DO NOT READJUST THE ROD END ASSEMBLY.
ROD ENDS WHICH HAVE OPERATED IN THIS
CONDITION ARE FATIGUED. THEY WILL BE
REMOVED FROM SERVICE AND WILL BE
DEMILITARIZED IAW PARAGRAPH 10.
F. IF THE DIMENSION "A" IS BETWEEN 3.095 INCH AND 3.185
INCH THE ROD END ADJUSTMENT IS CORRECT, AND THE DAMPENER IS
SERVICEABLE. IF IT IS NOT REFER TO PARAGRAPH 9B. THE LAG DAMPENER
SHOULD BE IDENTIFIED AS PART NUMBER 114H6800-11. IF IT IS NOT REFER
TO PARAGRAPH 9C.
9. CORRECTION PROCEDURES
A. REMOVE THE LAG DAMPENER.
B. REPLACE THE LAG DAMPENER WITH A SERVICEABLE LAG DAMPENER
OR REPLACE THE ROD END, TANG WASHER, AND JAM NUT WITH THE PARTS
LISTED IN PARAGRAPH 10A IAW TM 55-1520-240-23-4, TASK 5-89 OR TM
1-1520-252-23-4, TASK 5-131.
WARNING
P/N 114H6800-9 CONFIGURATION LAG DAMPENER SHALL
NOT BE INSTALLED ON H-47 SERIES AIRCRAFT. LOSS
OF OR DAMAGE TO AIRCRAFT MAY RESULT.
C. CHANGE THE DATA PLATE OF ANY LAG DAMPENERS THAT ARE
IDENTIFIED AS 114H6800-9 TO 114H6800-11 ONLY AFTER THE LAG
DAMPENER HAS BEEN ADJUSTED TO THE CORRECT LENGTH AND HAS THE
CORRECT PARTS IDENTIFIED IN PARAGRAPH 10A INSTALLED.
10. SUPPLY/PARTS AND DISPOSITION -
A. PARTS REQUIRED EITHER REPLACE DEFECTIVE LAG DAMPENERS
WITH P/N 114H6800-11 NSN 1650-01-371-2475 CONFIGURATION OR
CORRECT IAW PARAGRAPH 9B ABOVE USING THE FOLLOWING PARTS ONLY:
NOMENCLATURE PART NO. NSN
ROD END ASSEMBLY 234RS202-2 3120-01-313-9375
NUT, JAM NAS1423-14 5310-00-245-4568
WASHER, ROD END 145R2010-1 5310-01-399-2322
B. REQUISITIONING INSTRUCTIONS - REQUISITION REPLACEMENT
PARTS USING NORMAL SUPPLY PROCEDURES. ALL REQUISITIONS SHALL
USE PROJECT CODE (CC 57-59) "XFE", "X-RAY-FOXTROT-ECHO".
NOTE
PROJECT CODE "XFE", "X-RAY-FOXTROT-ECHO"
IS REQUIRED TO TRACK AND ESTABLISH A DATA
BASE OF STOCK FUND EXPENDITURES INCURRED
BY THE FIELD AS A RESULT OF SOF ACTIONS.
C. BULK AND CONSUMABLE MATERIALS N/A.
D. DISPOSITION- DEMILITARIZE/MUTILATE IAW
TM 1-1500-328-23 ANY ROD END ASSEMBLY WHICH WAS REMOVED IAW
PARAGRAPH 8 ABOVE FOR FAILURE TO MEET INSPECTION CRITERIA.
E. DISPOSITION OF HAZARDOUS MATERIAL N/A.
11. SPECIAL TOOLS AND FIXTURES REQUIRED - N/A.
12. APPLICATION -
A. CATEGORY OF MAINTENANCE - AVUM. AIRCRAFT DOWNTIME
WILL BE CHARGED TO AVUM.
B. ESTIMATED TIME REQUIRED FOR INSPECTION OF AIRCRAFT-
(1) TOTAL OF 1 MAN-HOUR USING 1 PERSON.
(2) TOTAL OF 1 HOUR DOWNTIME FOR ONE END ITEM.
C. ESTIMATED COST IMPACT TO THE FIELD -
NOMENCLATURE PART NO./NSN QTY COST EA TOTAL $
LAG DAMPENER ASSY 114H6800-11 6 $8,889.10 $53,334.60
1650-01-371-2475
ROD END ASSY 234RS202-2 6 $ 670.71 $ 4,024.26
3120-01-313-9375
NUT, JAM NAS1423-14 6 $ 3.53 $ 21.18
5310-00-245-4568
WASHER, ROD END 145R2010-1 6 $ 44.23 $ 265.38
5310-01-399-2322
TOTAL COST PER AIRCRAFT = $53,334.60 FOR DAMPENER REPLACEMENT
TOTAL COST PER AIRCRAFT = $4,310.82 FOR ROD END REPLACEMENT
D. TB/MWOS TO BE APPLIED PRIOR TO OR CONCURRENTLY WITH
THIS INSPECTION - N/A.
E. PUBLICATIONS WHICH REQUIRE CHANGE AS A RESULT OF THIS
INSPECTION - TM 1-1520-252-23-4 AND TM 55-1520-240-23-4 SHALL BE
CHANGED TO REFLECT THIS MESSAGE. A COPY OF THIS MESSAGE SHALL
BE INSERTED IN THE APPROPRIATE TM AS AUTHORITY TO IMPLEMENT THE
CHANGE UNTIL THE PRINTED CHANGE IS RECEIVED.
(1) REFERENCE 13A, TASK 5-89, STEP 2A SHALL BE CHANGED
TO READ "ON SHOCK ABSORBERS 114H6800-5 (TEFLON ROD END BEARINGS
OUTBOARD) DIMENSION "A" SHALL BE 3.345 INCH TO 3.435 INCH."
(2) REFERENCE 13A, TASK 5-89, STEP 2B SHALL BE CHANGED
TO READ "ON SHOCK ABSORBERS 114H6800-11 (ELASTOMERIC ROD END
BEARINGS OUTBOARD) DIMENSION "A" SHALL BE 3.095 INCH TO 3.185
INCH."
NOTE
DIMENSIONS "A" OF TASK 5-89 CANNOT BE ALTERED
TO OBTAIN DIMENSIONS REQUIRED BY TASK 5-90.
(3) REFERENCE 13A, TASK 5-90, STEP 7B, SECOND NOTE
SHALL BE CHANGED TO READ "IF FIXTURE 114G1306-1 OR
114G1306-7 IS NOT AVAILABLE, SHOCK ABSORBERS MAY BE
ADJUSTED BY MEASURING FROM CENTER HOLES OF BEARINGS. WITH
ELASTOMERIC BEARINGS THE MEASUREMENT SHOULD BE 18.390 INCH,
PLUS OR MINUS 0.005 INCH. WITHOUT ELASTOMERIC BEARINGS THE
MEASUREMENT SHOULD BE 18.642 INCH PLUS OR MINUS 0.005 INCH.
MAKE ADJUSTMENTS IAW STEP 8.
13. REFERENCES
A. TM 55-1520-240-23-4
B. TM 1-1520-252-23-4.
14. RECORDING AND REPORTING REQUIREMENTS -
A. REPORTING COMPLIANCE SUSPENSE DATE (AIRCRAFT) -
UPON ENTERING REQUIREMENTS OF THIS MESSAGE ON DA FORM 2408-
13-1 ON ALL SUBJECT MDS AIRCRAFT, FORWARD A PRIORITY
MESSAGE, DATAFAX OR E-MAIL TO CDR, AMCOM, ATTN: AMSAM-SF-A
(SOF COMPLIANCE OFFICER), REDSTONE ARSENAL, AL 35898-5222,
IAW AR 95-1. DATAFAX NUMBER IS DSN 897-2111 OR (256) 313-
2111. E-MAIL ADDRESS IS "SAFEADM@REDSTONE.ARMY.MIL". THE
REPORT WILL CITE THIS MESSAGE NUMBER, DATE OF ENTRY IN DA
FORM 2408-13-1, THE AIRCRAFT MISSION DESIGN SERIES AND
SERIAL NUMBERS OF AIRCRAFT IN NUMERICAL ORDER.
B. TASK/INSPECTION REPORTING SUSPENSE DATE (AIRCRAFT) - N/A
C. REPORTING MESSAGE RECEIPT (SPARES) - N/A
D. TASK/INSPECTION REPORTING SUSPENSE DATE (SPARES) - N/A.
E. THE FOLLOWING FORMS ARE APPLICABLE AND ARE TO BE
COMPLETED IAW DA PAM 738-751, 15 JUN 92
NOTE
ULLS-A USERS WILL USE APPLICABLE "E" FORMS.
(1) DA FORM 2408-13, AIRCRAFT STATUS INFORMATION
RECORD.
(2) DA FORM 2408-13-1, AIRCRAFT INSPECTION AND
MAINTENANCE RECORD.
(3) DA FORM 2408-15, HISTORICAL RECORD FOR AIRCRAFT.
(4) DD FORM 1577/DD FORM 1577-1, UNSERVICEABLE
(CONDEMNED) TAG/LABEL - MATERIEL (COLOR RED). ANNOTATE REMARKS
BLOCK WITH "CONDEMNED IAW CH-47-99-ASAM-01 AND MUTILATED IAW
TM 1-1500-328-23."
15. WEIGHT AND BALANCE - N/A.
16. POINTS OF CONTACT -
A. TECHNICAL POINT OF CONTACT FOR THIS MESSAGE IS MR. MATT
WESSELSCHMIDT, AMSAM-AR-E-I-C-H, DSN 897-4286/4284 OR (256) 313-
4286/4284, DATAFAX IS DSN 897-4348 OR (256) 313-4348.
E-MAIL IS "WESSELSCHMIDT-ML@AVRDECR.REDSTONE.ARMY.MIL".
B. LOGISTICAL POINT OF CONTACT FOR THIS MESSAGE IS MR. NORM
HUSTON, SFAE-AV-CH-L DSN 897-4289 OR (256) 313-4289, DATAFAX IS
DSN 897-4348 OR (256) 313-4348.
E-MAIL IS "HUSTONN@PEOAVN.REDSTONE.ARMY.MIL".
C. WHOLESALE MATERIEL POINT OF CONTACT (SPARES) - N/A
D. FORMS AND RECORDS POINT OF CONTACT FOR THIS MESSAGE IS
MS. ANN WALDECK, AMSAM-MMC-RE-FF DSN 746-5564 OR (256) 876-5564,
DATAFAX IS DSN 746-4904 OR (256) 876-4904.
E-MAIL IS "WALDECK-AB@REDSTONE.ARMY.MIL".
E. SAFETY POINT OF CONTACT FOR THIS MESSAGE IS MR. ROBERT D.
BROCK, AMSAM-SF-A, DSN 788-8632 OR (256) 842-8632, DATAFAX
IS DSN 897-2111 OR (256) 313-2111.
E-MAIL IS "BROCKRD@REDSTONE.ARMY.MIL".
F. FOREIGN MILITARY SALES RECIPIENTS REQUIRING
CLARIFICATION OF ACTION ADVISED BY THIS MESSAGE SHOULD
CONTACT: CW5 JOSEPH L. WITTSTROM, SECURITY ASSISTANCE
MANAGEMENT, AMSAM-SA, DSN 897-0681 OR (256) 313-0681.
EMAIL IS "WITTSTROM-JL@REDSTONE.ARMY.MIL" OR MR. RONNIE W.
SAMMONS, AMSAM-SA-CS-NF, DSN 897-0869 OR (256) 313-0869.
DATAFAX IS DSN 897-0411 OR (256) 313-0411.
EMAIL IS "SAMMONS-RW@REDSTONE.ARMY.MIL". HUNTSVILLE, AL IS
GMT MINUS 6 HRS.
G. AFTER HOURS CONTACT THE AMCOM COMMAND OPERATIONS
CENTER (COC ) DSN 897-2066/7 OR (256) 313-2066/7.