SYNOPSIS


CH-47-93-ASAM-03  AVIATION SAFETY ACTION MESSAGE, MAINTENANCE MANDATORY, ALL

                  CH-47D, MH-47D AND MH-47E HELICOPTERS, ONE TIME INSPECTION

                  OF PUMPING UNIT, HYDRAULIC, NSN 1650-01-240-4341.

                  121900Z MAR 93, TERESE MCGREW, AMSAT-C-XS, X2085.





                  NOTE: Enter a "Q" + <CR> to exit or <SPACEBAR> to view
                        the entire message.  (REPORTING)



.
 
 
01  11  121900Z MAR  93  PP  PP  UUUU             ZEXW   0711300Z
 
YES
 
         CDRATCOM ST LOUIS MO //AMSAT-C-XS//
 
              AIG 6713
 
              AIG 9004
 
              AIG 8708
 
              AIG 9042
 
              DEFARM CANBERRA AS //DOHS-A//
 
              DEFNAV CANBERRA AS
 
              CDRUSARDSG CANBERRA AS
 
              HQLCENG MELBOURNE AS //DAIRENG//
 
              LOG CON OTTAWA ONT CAN //DTHEM 6-3//
 
              AUSTNAV WASHINGTON DC //DEFNAV//
 
              AUSTAIR WASHINGTON DC //SENGSO//
 
              USOMC CAIRO EG //AV//
 
              ODC ATHENS GR //ODCSA-A//
 
              CDR4THBN228THAVN SOTO CANO HO //AVN-AMO//
 
              CDR160TH SOAR FT CAMPBELL KY //AOAV-SI//
 
              CDRBGAD RICHMOND KY //SDSBG-GC//
 
              CHMUSLO RABAT MO //AF//
 
              CHUSAS RIYADH SA //ASAV//
 
 
 
CF:  SFAE-AV-CH, AMSAT-R-ECC, AMSAT-I-ILNO(RAAF), AMSAT-I-MEA,
     AMSAT-I-LOS(AOC)
 
 
  TERESE MCGREW
  AMSAT-C-XS, X2085                        MINIMIZE CONSIDERED 
 
 
  EDWARD J. HOLLMAN
  CHIEF, SAFETY OFFICE
.
 
                                      UNCLAS
 
 
02  11  121900Z MAR  93  PP  PP  UUUU             ZEXW   0711300Z
 
YES
 
              ODC MADRID SP //ARMY AND NAVY SEC//
 
              CJUSMAG BANGKOK TH
 
              CDRUSARDSG LONDON UK //AMXSN-UK-SE//
 
         INFO CDRAMCCOM ROCK ISLAND IL //AMSAR-QAS-P//
 
              CDRAMC ALEXANDRIA VA //AMCMR/AMCCS/AMCSM-WAA//
 
         XMT  USDAO DHAKA BG
 
              USDAO RANGOON BM
 
              USDAO COLUMBO CE
 
              USDAO SUVA FJ
 
              OMADP JAKARTA ID
 
              DSA NEW DELHI IN
 
              USDAO ANTANANARIVO MA
 
              SAO KUALA LUMPUR MY
 
              USDAO KATMANDU NP //SAO//
 
              USDAO SINGAPORE SN //SAO//
 
UNCLAS RELEASABLE TO NATO ADDRESSEES
 
AIG 9004 TAKE FOR INFO ONLY
 
AIG 8708 TAKE FOR INFO ONLY
 
AIG 9042 TAKE FOR INFO ONLY
 
.
 
                                      UNCLAS
 
 
03  11  121900Z MAR  93  PP  PP  UUUU             ZEXW   0711300Z
 
YES
 
SUBJECT - AVIATION SAFETY ACTION MESSAGE, MAINTENANCE MANDATORY, RCS 
 
CSGLD-1860(R1), ALL CH47D, MH47D AND MH47E HELICOPTERS, ONE TIME 
 
INSPECTION OF PUMPING UNIT, HYDRAULIC, NSN 1650-01-240-4341.
 
(CH-47-93-ASAM-03) 
 
NOTE - THIS IS AN AVIATION SAFETY ACTION MESSAGE 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 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 
 
RETRANSMISSION TO COMMANDER, ATCOM, ATTN - AMSAT-C-XS (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
.
 
                                      UNCLAS
 
 
04  11  121900Z MAR  93  PP  PP  UUUU             ZEXW   0711300Z
 
YES
 
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 - AIRCRAFT WILL NOT BE 
 
RELEASED UNTIL COMPLIANCE WITH THIS ASAM HAS BEEN COMPLETED.
 
    D.  AIRCRAFT IN TRANSIT - 
 
         (1)  SURFACE/AIR SHIPMENT -  PRIOR TO FIRST FLIGHT. 
 
         (2)  FERRY STATUS -  SAME AS PARA 1A. 
 
    E.  MAINTENANCE TRAINERS (CATEGORY A, B AND OTHERS) - SAME AS 
 
PARA 1A.
 
    F.  COMPONENT/PARTS IN STOCK INCLUDING WAR RESERVES AT AVUM/AVIM 
 
LEVELS - REPORT IN ACCORDANCE WITH PARA 8B.
 
2.  TASK/INSPECTION SUSPENSE DATE - WITHIN 10 FLIGHT HOURS OR 5 DAYS 
 
FROM THE DATE OF THIS MESSAGE, WHICHEVER OCCURS FIRST.
 
3.  REPORTING COMPLIANCE SUSPENSE DATE -  REPORT COMPLIANCE TO 
 
COMMANDER, ATCOM, ATTN: AMSAT-C-XS NO LATER THAN 5 APRIL 93 PER PARA 
 
14A OF THIS MESSAGE.
 
.
 
                                      UNCLAS
 
 
05  11  121900Z MAR  93  PP  PP  UUUU             ZEXW   0711300Z
 
YES
 
4.  SUMMARY OF PROBLEM - 
 
    A.  THE CH-47D FLEET IS CURRENTLY EXPERIENCING HYDRAULIC SYSTEM 
 
FAILURES.  A TYPICAL SCENARIO IS AS FOLLOWS:  DURING NORMAL FLIGHT, 
 
THE HYDRAULIC SYSTEM PRESSURE INDICATES PRESSURE FLUCUATIONS FROM A 
 
MAXIMUM OF 4000 PSI TO A MINIMUM OF 2000 PSI, FOLLOWED BY  
 
ILLUMINATION OF THE HYDRAULIC FLIGHT CONTROL SEGMENT LIGHT.  ALSO, 
 
HIGH TEMPERATURES IN THE HYDRAULIC SYSTEM HAVE BEEN NOTED WHEN 
 
AIRCRAFT IS SHUT DOWN.  AN INTENSIVE INVESTIGATION IS BEING 
 
CONDUCTED.  THE INVESTIGATION IS CENTERED ON THE FLIGHT 
 
CONTROL/UTILITY HYDRAULIC PUMP AT THIS TIME, ALTHOUGH IT IS NOT 
 
CERTAIN THAT THE PUMP IS THE ROOT CAUSE.
 
    B.  THE SUSPECT PUMPS ARE MANUFACTURED BY STRATO-POWER AND THE 
 
SERIAL NUMBERS HAVE A SUFFIX "BO", NSN 1650-01-240-4341, P/N 
 
64WE075102 AND OR 938555.  IT SHOULD BE NOTED THAT NO ABNORMAL 
 
PROBLEMS HAVE BEEN REPORTED WITH THE VICKERS PUMP, NSN 
 
1650-01-115-3948, P/N PV3-075-20.  FURTHER INFORMATION AND 
 
INSTRUCTIONS WILL BE DISSEMINATED AS SOON AS IT IS AVAILABLE. REPORT 
 
ALL FAILURES THRU QDR SYSTEM TO SUPPORT INVESTIGATIONS.
 
    C.  THE CH-47 HAS 3 HYDRAULIC PUMPS ON BOARD AND ANY ONE IS 
 
CAPABLE OF POWERING THE FLIGHT CONTROLS.  POWER TRANSFER UNIT (PTU)
.
 
                                      UNCLAS
 
 
06  11  121900Z MAR  93  PP  PP  UUUU             ZEXW   0711300Z
 
YES
 
CAN BE UTILIZED IN EMERGENCY CONDITIONS WHEN POWERED BY UTILITY 
 
HYDRAULIC PUMP OR APU MOTOR PUMP.  IN THE EVENT SUCH A FAILURE 
 
OCCURS, UTILIZE CURRENT PROCEDURES OF TM 55-1520-240-10 PARA 9-49.
 
   D.  THE PURPOSE OF THIS MESSAGE IS TO ALERT USERS OF THE 
 
POTENTIAL PROBLEM, TO INSPECT FOR AND REPORT SUSPECT PUMPS TO 
 
FACILITATE EVENTUAL CORRECTIVE ACTION.   THE CH-47D HAS A TRIPLE 
 
REDUNDANT SYSTEM AND THIS IS A LOW RISK SAFETY ISSUE.
 
5.  END ITEMS TO BE INSPECTED - ALL CH-47D/MH-47D/MH-47E AIRCRAFT.  
 
6.  ASSEMBLY COMPONENTS TO BE INSPECTED -
 
    NOMENCLATURE             PART NO.               NSN
 
PUMPING UNIT, HYDRAULIC       938555          1650-01-240-4341
 
PUMPING UNIT, HYDRAULIC       64WE075102      1650-01-240-4341
 
7.  PARTS TO BE INSPECTED - N/A.
 
8.  INSPECTION PROCEDURES - 
 
    A.  PERFORM A VISUAL INSPECTION OF ALL THREE HYDRAULIC PUMPS.  
 
REFERENCE TM 55-1520-240-23P, FIG 178, ITEM 12 (1 PUMP) AND FIG 183 
 
ITEM 26 (2 PUMPS). 
 
    B.  RECORD THE FOLLOWING DATA FROM EACH STRATO-POWER PUMP AND 
 
REPORT IN ACCORDANCE WITH PARA 14B BELOW.
 
        (1) LOCATION (NO. 1 FLIGHT CONTROL(FORWARD TRANSMISSION),
.
 
                                      UNCLAS
 
 
07  11  121900Z MAR  93  PP  PP  UUUU             ZEXW   0711300Z
 
YES
 
NO. 2 FLIGHT CONTROL OR UTILITY SYSTEM (AFT TRANSMISSION) AND 
 
SPARES.
 
        (2) AIRCRAFT SERIAL NUMBER, AIRCRAFT HOURS. 
 
        (3) PUMP SERIAL NUMBER.
 
    C.  INSPECT PUMP FOR BROKEN SCREWS,(ITEM 14, FIGURE 183A, REF. 
 
13A) ON THE PUMP BODY (NOT THE MOUNTING BOLTS), AND FOR EVIDENCE OF 
 
LEAKS.  REPLACE ANY PUMP WHICH HAS BROKEN SCREWS OR EXCESSIVE 
 
LEAKAGE.  REPORT ANY PUMPS FOUND UNSERVICEABLE TO LOG POC PARA 16B 
 
BELOW.
 
9.  CORRECTION PROCEDURES - TO BE DETERMINED.
 
                                 NOTE
 
A COPY OF THIS MESSAGE WILL BE PLACED IN THE AIRCREW INFORMATION 
 
READING FILE. 
 
10.  SUPPLY/PARTS AND DISPOSITION - CONTACT LOGISTICAL POC PER PARA 
 
16B BELOW.
 
11.  SPECIAL TOOLS, JIGS AND FIXTURES REQUIRED - N/A.  
 
12.  APPLICATION - 
 
    A.  CATEGORY OF MAINTENANCE - AVUM.  AIRCRAFT DOWNTIME WILL BE 
 
CHARGED TO AVUM.
 
.
 
                                      UNCLAS
 
 
08  11  121900Z MAR  93  PP  PP  UUUU             ZEXW   0711300Z
 
YES
 
    B.  TIME REQUIRED - 
 
        (1)  TOTAL OF .5 MANHOUR USING 1 PERSON.
 
        (2)  TOTAL OF .5 HOUR DOWNTIME FOR ONE END ITEM.
 
    C.  ESTIMATED COST IMPACT OF STOCK FUND ITEMS TO THE FIELD - 
 
N/A.
 
    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 - A COPY OF THIS MESSAGE WILL BE PLACED IN THE AIRCREW 
 
INFORMATION READING FILE.
 
13.  REFERENCES - 
 
    A. TM 55-1520-240-23P, DATED 1 NOV 89, WITH CHANGES.
 
    B. TM 55-1520-240-10, DATED 30 APR 92, WITH CHANGES.
 
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-C-XS (SOF COMPLIANCE OFFICER), PER 
 
AR 95-3.  DATAFAX NUMBER IS DSN 693-2064 OR COMMERCIAL
.
 
                                      UNCLAS
 
 
09  11  121900Z MAR  93  PP  PP  UUUU             ZEXW   0711300Z
 
YES
 
314/263-2064.  E-MAIL ADDRESS IS "AMSATCXS (AT SIGN) 
 
ST-LOUIS-EMH4.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.
 
UPON ENTERING REQUIREMENTS OF THIS MESSAGE ON DA FORM 2408-13, 
 
FORWARD A PRIORITY MESSAGE, DATAFAX OR E-MAIL TO COMMANDER, ATCOM, 
 
ATTN AMSAT-C-XS (SOF COMPLIANCE OFFICER), PER AR 95-3.  DATAFAX 
 
NUMBER IS DSN 693-2064 OR COMMERCIAL 314/263-2064.  
 
    B.  TASK/INSPECTION REPORTING SUSPENSE DATE (AIRCRAFT) - UPON 
 
COMPLETION OF INSPECTION, UNITS WILL FORWARD A PRIORITY MESSAGE OR 
 
DATAFAX, DSN 693-1485 OR COMMERCIAL 314/263-1485 TO:  COMMANDER, 
 
ATCOM, ATTN:  SFAE-AV-CH-L.  THE REPORT WILL CITE THIS MESSAGE 
 
NUMBER, DATE OF INSPECTION, AIRCRAFT SERIAL NUMBER, AIRCRAFT HOURS 
 
AND SERIAL NUMBERS OF STRATO POWER PUMP NUMBERS.  INSPECTION AND 
 
REPORTS WILL BE COMPLETED NO LATER THAN TASK/INSPECTION SUSPENSE 
 
DATE.
 
    C.  REPORTING COMPLIANCE SUSPENSE DATE (SPARES) - N/A.
 
    D.  TASK/INSPECTION REPORTING SUSPENSE DATE (SPARES) - SEE PARA 
 
8B ABOVE.
 
.
 
                                      UNCLAS
 
 
10  11  121900Z MAR  93  PP  PP  UUUU             ZEXW   0711300Z
 
YES
 
    E.  THE FOLLOWING FORMS ARE APPLICABLE AND ARE TO BE COMPLETED 
 
IN ACCORDANCE WITH DA PAM 738-751, 15 JUN 92 - 
 
        (3)  DA FORM 2408-13, AIRCRAFT STATUS INFORMATION RECORD.
 
        (4)  DA FORM 2408-13-1, AIRCRAFT INSPECTION AND MAINTENANCE 
 
RECORD.
 
        (5)  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 
 
LAWYER, SFAE-AV-CH-T, DSN 693-3550 OR COMMERCIAL 314/263-3550.
 
    B.  LOGISTICAL POINT OF CONTACT FOR THIS MESSAGE IS MR. STEVE 
 
KOUCHNERKAVICH, SFAE-AV-CH-L, DSN 693-2063/1415 OR COMMERCIAL 
 
314/263-2063/1415, DATAFAX DSN 693-1485 OR COMMERCIAL 314/263-1485.
 
    C.  FORMS AND RECORDS POINT OF CONTACT FOR THIS MESSAGE IS MS. 
 
ANN WALDECK, AMSAT-I-MDM, DSN 693-1758 OR COMMERCIAL 314/263-1758.
 
    D.  SAFETY POINT OF CONTACT FOR THIS MESSAGE IS MS. TERESE 
 
MCGREW, AMSAT-C-XS, DSN 693-2085/2258 OR COMMERCIAL 
 
314/263-2085/2258.
 
    E.  FOREIGN MILITARY SALES (FMS) RECIPIENTS REQUIRING
.
 
                                      UNCLAS
 
 
11  11  121900Z MAR  93  PP  PP  UUUU             ZEXW   0711300Z
 
YES
 
CLARIFICATION OF ACTION ADVISED BY THIS MESSAGE SHOULD CONTACT MW4 
 
JAY NANCE/MR. RON VAN REES, AMSAT-I-IA, DSN 693-3826/3659 OR 
 
COMMERCIAL 314/263-3826/3659.
 
    F.  AFTER HOURS CONTACT AVSCOM COMMAND OPERATIONS CENTER (COC) 
 
DSN 693-2066/7 OR COMMERCIAL 314/263-2066/7.