Boeing CH-47 Chinook Aviation Safety Action Message CH-47-97-ASAM-05, One time inspection for and replacement of AN320-12 Castellated Nuts made by Greer Stop Nut Inc.

01 15 131508Z MAR 97 PP PP UUUU AA ZYUW ZW

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:USMILGP BUENOS AIRES AR//ARMY AND AF SEC//
:DEFAIR MATERIAL CANBERRA AS//DAAP-AF//
:CDRUSARDSG CANBERRA AS//AMXIP-AS//
:ARGENTINE AIR ATTACHE FMS WASHINGTON DC
:EGYPT AF FMS CAIRO EG//ED/MA//
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:ROK ARMY FMS PUSAN KOR//ALC-LSD-L//
:CDR160TH SOAR FT CAMPBELL KY//AOAV-SI//
:CDRBGAD RICHMOND KY//SIOBG-GC//
:USDAO RABAT MO//AF//
:ODC THE HAGUE NL//AVIATION SAFETY//
:RNLAF MATERIAL
:RNLAF OPERATIONS
:CDRUSASAC NEW CUMBERLAND PA//AMSAC-SALO-UK//
:CHUSAS RIYADH SA//ASAV//
:SAO SINGAPORE SN//AVIATION SAFETY//
:ODC MADRID SP//ASM//
:SPAIN ARMY FMS MADRID SP
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:ROYAL THAI ARMY FMS BANGKOK TH//BANGSUE DEPOT//
:ROYAL THAI AF FMS BANGKOK TH//DUSIT ORDANCE DEPOT//
:CDRUSARDSG LONDON UK//AMXSN-UK-SE//
:ODC LONDON UK
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:FAA SOUTHWEST RGN HQ FORT WORTH TX//ASW-100//
:CDRAMC ALEXANDRIA VA//AMCMR/AMCCS/AMCSM-WAA//
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:AMEMBASSY ANTANANARIVO MA
:AMEMBASSY PORT LOUIS
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:AMEMBASSY KATHMANDU NP//POL-MIL//
ACCT
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TEXT
:UNCLAS
SUBJECT: AVIATION SAFETY ACTION MESSAGE (ASAM), MAINTENANCE
MANDATORY, RCS CSGLD-1860(R1), ALL CH-47D, MH-47D, AND MH-47E
AIRCRAFT, ONE TIME INSPECTION FOR AND REPLACEMENT OF AN320-12
CASTELLATED NUTS MADE BY GREER STOP NUT INC. (CH-47-97-ASAM-05)
(TB 1-1520-240-20-93).
NOTE - THIS IS AN AVIATION SAFETY ACTION MESSAGE (ASAM) ISSUED
PER AR 95-3, CHAPTER 5 REVISION VIA MESSAGE, HQ AVSCOM, AMSAV-
XSOF, 181900Z SEP 90, SUBJECT: CHANGE TO AR 95-3, CHAPTER 5,
SAFETY OF FLIGHT MESSAGES. THIS ASAM 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 THIS MESSAGE. ACTION ADDRESSEES WILL IMMEDIATELY
VERIFY THIS TRANSMISSION TO COMMANDER, ATCOM, ATTN: AMSAT-R-X
(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 BELOW 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 ASAM WITHIN THE TIME FRAME REQUIRED
WILL CAUSE THE STATUS SYMBOL TO BE UPGRADED TO A RED //X//.
B. AIRCRAFT IN DEPOT MAINTENANCE - INSPECT AND CORRECT
PRIOR TO ISSUE. AIRCRAFT SHALL 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 - SAME AS PARA 1A.
(2) FERRY STATUS - SAME AS PARA 1A.
E. MAINTENANCE TRAINERS (CATEGORY A, B) - SAME AS PARA 1A.
F. COMPONENT/PARTS IN STOCK AT ALL LEVELS (DEPOT AND
OTHERS) INCLUDING WAR RESERVES - UPON RECEIPT OF THIS ASAM, THE
MATERIEL CONDITION TAGS OF ALL ITEMS LISTED IN PARA 7 BELOW IN
ALL CONDITION CODES SHALL BE ANNOTATED TO READ MESSAGE CH-47-97-
ASAM-05, ONE TIME INSPECTION AND REPLACEMENT OF AN320-12
CASTELLATED NUTS MADE BY GREER STOP NUT INC. MUST BE COMPLIED
WITH PRIOR TO ISSUE..
(1) WHOLESALE STOCK - UPON RECEIPT OF THIS ASAM, DEPOT
COMMANDERS SHALL ENSURE INSPECTION OF ALL ITEMS LISTED IN PARA 7
BELOW LOCATED IN ALL WHOLESALE DEPOTS INCLUDING ALL SATELLITE
WHOLESALE DEPOTS AND WAR RESERVE DEPOTS. UPON RECEIPT OF THIS
ASAM COMMANDERS AND OTHERS MAINTAINING WHOLESALE STOCK SHALL
ENSURE THAT SERVICEABLE MATERIEL (CONDITION CODES //A//, //B//,
AND //C//) IS PLACED IN CONDITION CODE //J// AND TAGGED WITH A
SUSPENDED TAG/LABEL - DD FORM 1576/1576-1. THE AUTHORITY BLOCK
MUST REFERENCE INSPECTION REQUIRED PER THIS ASAM (TB 1-1520-240-
20-93). ANY NUTS FOUND DISCREPANT PER THE INSPECTION PROCEDURES
CITED IN PARA 8 BELOW SHALL BE DISPOSED OF BY MUTILATION TO
PREVENT RESALE, OR REUSE.
(2) RETAIL STOCK - UPON RECEIPT OF THIS ASAM,
COMMANDERS AND OTHERS MAINTAINING RETAIL STOCK OF ITEMS LISTED IN
PARA 7 BELOW SHALL CONTACT THEIR SUPPORT AVIATION ORGANIZATION TO
PERFORM THE INSPECTION REQUIRED BY PARA 8 BELOW AND TO PERFORM
THE CORRECTION PROCEDURES OF PARA 9 BELOW ON DISCREPANT MATERIEL.
ALL ITEMS LISTED IN PARA 7 BELOW SHALL BE IMMEDIATELY PLACED IN
CONDITION CODE //D// AND RETAGGED WITH A TEST/MODIFICATION
TAG/LABEL - DD FORM 1576/1576-1 (BLUE COLOR). THE AUTHORITY BLOCK
MUST REFERENCE INSPECTION REQUIRED PER THIS ASAM (TB 1-1520-240-
20-93). ITEMS IDENTIFIED AS SERVICEABLE IAW PARA 8 BELOW SHALL
BE RETAGGED WITH A SERVICEABLE TAG/LABEL - DD FORM 1574/1574-1
(YELLOW COLOR). INDICATE COMPLIANCE WITH THIS ASAM (TB 1-1520-
240-20-93) IN THE REMARKS BLOCK. ANY ITEMS FOUND DISCREPANT PER
THE INSPECTION PROCEDURES CITED IN PARA 8 BELOW SHALL BE DISPOSED
OF BY MUTILATION TO PREVENT RESALE, OR REUSE. REPORT COMPLIANCE
WITH THIS ASAM IN ACCORDANCE WITH PARA 14D(2) BELOW.
G. COMPONENTS/PARTS IN WORK - N/A.
2. TASK/INSPECTION SUSPENSE DATE - WITHIN 10 HOURS/14 DAYS.
3. REPORTING COMPLIANCE SUSPENSE DATE - NO LATER THAN 3 APR 1997
PER PARA 14A OF THIS MESSAGE.
4. SUMMARY OF PROBLEM -
A. THERE HAVE BEEN THREE REPORTED INSTANCES OF AN320-12
CASTELLATED NUTS FOUND CRACKED. ONE DURING PRE-FLIGHT INSPECTION
OF A CH-47D HELICOPTER WHERE A LAG DAMPER ATTACHMENT NUT AT THE
ROTOR HEAD CONNECTION WAS FOUND CRACKED. THE SECOND DURING POST
FLIGHT INSPECTION OF A MH-47E HELICOPTER. BOTH NUTS WERE
FORWARDED TO CORPUS CHRISTI ARMY DEPOT (CCAD) FOR FAILURE
ANALYSIS WHICH REVEALED THE NUTS WERE CRACKED AT THE
MANUFACTURERS DESIGNATION (LOGO) IMPRESSION STAMP. THE
DEFECTIVE NUTS WERE BOTH DOUBLE IMPRESSION STAMPED WITH THE
LETTER CAPITAL G, WHICH IS THE REGISTERED LOGO OF GREER STOP
NUT INC. (CAGE 27687). A THIRD INSTANCE INVOLVING A MH-47E
HELICOPTER WAS VERY RECENTLY REPORTED AND IS BEING INVESTIGATED.
B. THE CCAD FAILURE ANALYSES CONCLUDED THAT THERE WERE
THREE CONTRIBUTING CAUSES OF FAILURE. THE DOUBLE STAMP
IMPRESSION ON THE CRACKED NUTS AND THE EXCESSIVE DEPTH OF THE
IMPRESSIONS PROVIDED AN AREA OF STRESS CONCENTRATION THAT
ASSISTED IN THE CRACKING. THE TORQUE VALUE FOR THE NUT IN THE
TMS WERE TOO HIGH IN THE DRIVE ARM ATTACHMENT INSTALLATION AND
NEEDED TO BE LOWERED TO NOT TO EXCEED 3000 INCH-POUNDS. ALSO,
THE GRAIN STRUCTURE CONTAINED ISLANDS OF PEARLITE AND FERRITE,
BOTH OF WHICH ARE CHARACTERISTIC OF SOFT PHASES OF STEEL. THE
NUTS SHOULD HAVE BEEN QUENCHED AND TEMPERED STEEL.
C. FOR MANPOWER/DOWNTIME AND FUNDING IMPACTS, SEE PARA 12
BELOW.
D. THE PURPOSE OF THIS ASAM MESSAGE IS TO INSPECT THE
FORWARD AND AFT ROTOR SYSTEM AND CONTROLS INSTALLATIONS, AS
DELINEATED IN PARA 8 BELOW, AND TO REPLACE AN320-12 CASTELLATED
NUTS THAT EXHIBIT A LETTER CAPITAL G VENDOR IDENTIFICATION
IMPRESSION STAMP.
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
ROTOR SYSTEM INSTL, 145R0002-SERIES N/A (XC)
FORWARD AND AFT
CONTROLS INSTL, 145R3550-SERIES N/A (XC)
FORWARD AND AFT
7. PARTS TO BE INSPECTED -
NOMENCLATURE PART NO. NSN
NUT, THIN, PLAIN, AN320-12 5310-00-176-8115
CASTELLATED, SHEAR
8. INSPECTION PROCEDURES -
A. PREPARE THE AIRCRAFT FOR SAFE GROUND MAINTENANCE.
B. VISUALLY INSPECT THE FORWARD AND AFT ROTOR SYSTEM
INSTALLATION AT THE LAG DAMPER (SHOCK ABSORBER) ATTACHMENTS
(REFER TO TM 55-1520-240-23P-1, FIGURE 173, ITEM NO. 5 OR TM 1-
1520-252-23P-2, FIGURE 05-1, ITEM NO. 5) AND THE FORWARD AND AFT
CONTROLS INSTALLATION AT DRIVE ARM ATTACHMENT TO THE DRIVE COLLAR
(REFER TO TM55-1520-240-23P-1, FIGURE 177, ITEM NO. 41 OR TM1-
1520-252-23P-2, FIGURE 05-6, ITEM NO. 41), FOR AN320-12
CASTELLATED NUTS EXHIBITING THE LETTER CAPITAL G VENDOR
IDENTIFICATION IMPRESSION STAMP.
C. IF THE IMPRESSION STAMP IS ANYTHING OTHER THAN A CAPITAL
G, OR THERE IS NONE, NO FURTHER ACTION IS REQUIRED. RECORD AND
REPORT COMPLIANCE WITH THIS ASAM IN ACCORDANCE WITH PARA 14
BELOW.
D. IF THE IMPRESSION STAMP IS THE LETTER CAPITAL G,
PROCEED TO PARA 9 BELOW FOR CORRECTIVE ACTION.
9. CORRECTION PROCEDURES -
A. REPLACE AN320-12 CASTELLATED NUTS EXHIBITING THE
IMPRESSION STAMPED LETTER CAPITAL G, WHICH IS THE REGISTERED
LOGO OF GREER STOP NUT INC. (CAGE 27687), WITH ANY OTHER
MANUFACTURERS AN320-12 CASTELLATED NUT.
B. ANY AN320-12 CASTELLATED NUTS IN SUPPLY WITH AN
IMPRESSION STAMPED LETTER CAPITAL G WAS MANUFACTURED BY GREER
STOP NUT INC. AND SHALL BE DISPOSED OF BY MUTILATION TO PREVENT
RESALE, OR REUSE.
10. SUPPLY/PARTS AND DISPOSITION -
A. PARTS REQUIRED - ITEMS CITED IN PARA 7 ABOVE MAY BE
REQUIRED TO REPLACE DEFECTIVE ITEMS.
B. REQUISITIONING INSTRUCTIONS - REQUISITION REPLACEMENT PARTS
THROUGH NORMAL SUPPLY CHANNELS USING NORMAL SUPPLY PROCEDURES. ALL
REQUISITIONS SHALL USE PROJECT CODE XC6 PER THIS MESSAGE.
(2) PROJECT CODE XC6 IS REQUIRED TO TRACK AND
ESTABLISH A DATA BASE OF STOCK FUND EXPENDITURES INCURRED BY THE
FIELD AS A RESULT OF SOF/ASAM ACTIONS.
C. BULK AND CONSUMABLE MATERIALS - N/A.
D. DISPOSITION - AFTER MUTILATION, DISPOSE OF REMOVED
COMPONENTS/PARTS IAW NORMAL SUPPLY PROCEDURES. A QDR IS NOT
REQUIRED.
E. DISPOSITION OF HAZARDOUS MATERIAL - N/A.
11. SPECIAL TOOLS, JIGS AND FIXTURES REQUIRED - N/A.
12. APPLICATION -
A. CATEGORY OF MAINTENANCE - AVUM.
B. ESTIMATED TIME REQUIRED -
(1) TOTAL OF 1 MAN-HOURS USING 1 PERSONS.
C. ESTIMATED COST IMPACT OF STOCK FUND ITEMS TO THE FIELD -
A TOTAL OF (8) P/N AN320-12 NSN 5310-00-176-8115 CASTELLATED NUTS
ARE REQUIRED PER AIRCRAFT AT A COST OF $39.29 PER BAG OF (20).
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 - THE FOLLOWING PUBLICATIONS WERE PREVIOUSLY CHANGED
TO INCORPORATE THE CORRECT TORQUE VALUES REFLECTED IN THIS ASAM -
(1) TM 55-1520-240-23-5, CHAPTER 5, TASK 5-112.
(2) TM 1-1520-252-23-5, CHAPTER 5, TASK 5-163.
13. REFERENCES -
A. TM 55-1520-240-23-5.
B. TM 1-1520-252-23-5.
C. TM 55-1520-240-23P-1.
D. TM1-1520-252-23P-2.
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 COMMANDER, ATCOM, ATTN: AMSAT-R-X (SOF COMPLIANCE
OFFICER), PER AR 95-3. DATAFAX NUMBER IS DSN 693-2064 OR
COMMERCIAL 314/263-2064. E-MAIL ADDRESS IS "AMSATRXS (AT SIGN)
EMH4.STL.ARMY.MIL". THE REPORT WILL CITE THIS ASAM 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 COMPLIANCE SUSPENSE DATE (SPARES) - N/A.
D. TASK/INSPECTION REPORTING SUSPENSE DATE (SPARES) -
(1). MATERIAL IN WHOLESALE DEPOT STORAGE- REPORT
COMPLIANCE WITH THIS ASAM TO THE WHOLESALE MATERIEL POINT OF
CONTACT (SPARES) LISTED IN PARA 16C WITHIN 5 WORKING DAYS FROM
THE DATE OF THIS MESSAGE. PROVIDE AN ESTIMATE OF THE COST
REIMBURSABLE FUNDING REQUIRED TO MOVE THE ITEMS LISTED IN PARA 7
ABOVE TO A WORK AREA, UNPACK THE MATERIEL, REPACK THE MATERIEL
AFTER INSPECTION BY ATCOM INSPECTORS, AND TO RETURN THE MATERIEL
TO STORAGE. REPORT BY E-MAIL OR DATA FAX AND PROVIDE LOCAL POINT
OF CONTACT.
(2) MATERIAL IN RETAIL STORAGE- REPORT COMPLIANCE WITH
THIS MESSAGE BY E-MAIL OR DATA FAX AND PROVIDE LOCAL POINT OF
CONTACT TO THE LOGISTICAL POINT OF CONTACT IN PARAGRAPH 16B
WITHIN 5 WORKING DAYS FROM THE DATE OF THIS MESSAGE. REPORT THE
QUANTITY INSPECTED BY CONDITION CODE, AND THE RESULTING CONDITION
CODE.
E. THE FOLLOWING FORMS ARE APPLICABLE AND ARE TO BE
COMPLETED IN ACCORDANCE WITH DA PAM 738-751, 15 JUN 92 -
(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.
15. WEIGHT AND BALANCE - N/A.
16. POINTS OF CONTACT -
A. TECHNICAL POINT OF CONTACT FOR THIS MESSAGE IS
MR. ROBERT A. LAWYER, AMSAT-R-ECC, DSN 693-3820 OR COMMERCIAL
314/263-3820, HIS DATA FAX NUMBER IS DSN 693-1485 OR COMMERCIAL
314/263-1485.
B. LOGISTICAL POINT OF CONTACT FOR THIS MESSAGE IS
MR. NORM HUSTON, AMCPM-CH-L, DSN 693-1415 OR COMMERCIAL 314/263-
1415, HIS DATA FAX NUMBER IS DSN 693-1485 OR COMMERCIAL 314/263-
1485.
C. WHOLESALE MATERIEL POINT OF CONTACT (SPARES) FOR THIS
MESSAGE IS MR. HAL BARNES, AMSAT-I-SACA, COMMERCIAL TELEPHONE
314/263-6031, FAX 314/263-6022, AND DSN 693-6031, FAX 693-6022.
D. FORMS AND RECORDS POINT OF CONTACT FOR THIS MESSAGE IS
MS. ANN WALDECK, AMSAT-I-MDM, DSN 490-2318 OR COMMERCIAL 314/260-
2318.
E. SAFETY POINT OF CONTACT FOR THIS MESSAGE IS MR. JIM
WILKINS, AMSAT-R-X, DSN 693-2258 OR COMMERCIAL 314/263-2258.
F. FOREIGN MILITARY SALES (FMS) RECIPIENTS REQUIRING
CLARIFICATION OF ACTION ADVISED BY THIS MESSAGE SHOULD CONTACT
CW5 JAY NANCE/MR. RON VAN REES, AMSAT-D-S, DSN 693-7844/3216 OR
COMMERCIAL 314/263-7844/3216.
G. AFTER HOURS CONTACT ATCOM COMMAND OPERATIONS CENTER
(COC), DSN 693-2066/7 OR COMMERCIAL 314/263-2066/7.
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