01 16 021555Z APR 97 PP PP UUUU AA ZDSW
FROM
:CDRATCOM ST LOUIS MO//AMSAT-R-X//
TO
:AIG 8881
:AIG 9004
:AIG 8708
:AIG 9042
:AIG 7471
:AIG 12124
: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//
:USOMC CAIRO EG//AV//
:ODC ATHENS GR//ODCSA//
:CHJUSMAG SEOUL KOR//MKAR-AV//
: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
:AIT TAIPEI TW
:TAIWAN ARMY FMS TAIPEI TW
:CJUSMAG THAI BANGKOK TH//MAGTAR-FS//
: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
INFO
:FAA SOUTHWEST RGN HQ FORT WORTH TX//ASW-100//
:CDRAMC ALEXANDRIA VA//AMCMR/AMCCS/AMCSM-WAA//
XMT
:USDAO DHAKA BG
:USDAO RANGOON BM
:USCINCPAC REP PHNOM PENH CB
:USDAO COLOMBO CE
:USDAO SUVA FJ
:OMADP JAKARTA ID
:DSA NEW DELHI IN
:AMEMBASSY ANTANANARIVO MA
:AMEMBASSY PORT LOUIS
:SAO KUALA LUMPUR MY
:AMEMBASSY KATHMANDU NP//POL-MIL//
ACCT
:
TEXT
:UNCLAS
THIS IS A CORRECTED COPY - TO CHANGE THE CH-47 MESSAGE
NUMBER TO THE CORRECT SEQUENCE NUMBER
SUBJECT - AVIATION SAFETY ACTION MESSAGE, OPERATIONAL, RCS
CSGLD-1860(R1), ALL CH-47D HELICOPTERS AND RC-12 SERIES
AIRCRAFT, INFORMATIONAL UPDATE AND POSSIBLE SOLUTION FOR
NAVSTAR AN/ASN-149(V1) GLOBAL POSITIONING SYSTEM CONTROL
DISPLAY UNIT LOCKUP WHENEVER THE RECEIVER IS TRACKING
SATELLITE PRN 30. CH-47-97-ASAM-06 AND C-12-97-ASAM-02.
NOTE - THIS IS AN AVIATION SAFETY ACTION MESSAGE ISSUED PER
AR 95-3, CHAPTER 5 REVISION VIA MESSAGE HQ ATCOM, 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 THIS MESSAGE.
ACTION ADDRESSES WILL IMMEDIATELY VERIFY THIS RETRANSMISSION
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 REQUIREMENTS OF PARA 8
BELOW ARE COMPLETED. THE AFFECTED AIRCRAFT SHALL BE
INSPECTED AS SOON AS PRACTICAL BUT NO LATER THAN THE
TASK/INSPECTION SUSPENSE DATE.
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 - SAME AS PARA 1A.
(1) SURFACE/AIR SHIPMENT - SAME AS PARA 1A.
(2) FERRY STATUS - SAME AS PARA 1A.
E. MAINTENANCE TRAINERS (CATEGORY A AND B) - N/A.
F. COMPONENT/PARTS IN STOCK INCLUDING WAR RESERVES AT
ALL LEVELS (DEPOT AND OTHERS) -
(1) RETAIL STOCK - N/A.
(2) WHOLESALE STOCK - N/A.
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 23
APR 97 PER PARA 14A OF THIS MESSAGE.
4. SUMMARY OF PROBLEM -
A. A SOFTWARE PROBLEM EXISTS IN THE AN/ASN-149(V1)
GLOBAL POSITIONING SYSTEM RECEIVER THAT MANIFESTS ITSELF AS
A CONTROL DISPLAY UNIT (CDU) LOCKUP WHENEVER THE RECEIVER IS
TRACKING SATELLITE PRN 30. THE RECEIVER CONTINUES TO
NAVIGATE, HOWEVER THE OPERATOR CANNOT CONTROL THE CDU AND
THEREFORE IS UNABLE TO CHANGE THE DATA DISPLAYED. THE
PROBLEM OCCURS ONLY WHEN SATELLITE PRN 30 IS IN VIEW. FOR
MOST OF THE WORLD, SATELLITE PRN 30 IS VISIBLE TWICE DAILY
FOR ABOUT FOUR HOURS EACH TIME.
B. FOR MANPOWER/DOWNTIME AND FUNDING IMPACTS SEE PARA
12.
C. THE PURPOSE OF THIS MESSAGE IS TO INFORM THE USER OF
THE AN/ASN-149(V1) CDU LOCKUP WHENEVER THE RECEIVER IS
TRACKING SATELLITE PRN 30. THERE IS ALSO A PARTIAL WORK
AROUND TO RESOLVE THE PROBLEM.
5. END ITEMS TO BE INSPECTED - ALL CH-47D AIRCRAFT AND RC-
12 SERIES AIRCRAFT.
6. ASSEMBLY COMPONENTS TO BE INSPECTED -
NOMENCLATURE PART NO.
GPS RECEIVER AN/ASN-149(V1) SERIES
CONTROL DISPLAY UNIT C-11702/UR
7. PARTS TO BE INSPECTED - N/A
8. INSPECTION PROCEDURES - INSPECT AFFECTED AIRCRAFT TO
DETERMINE THE TYPE OF GPS RECEIVER INSTALLED.
A. IF IT HAS THE AN/ASN-149(V1) RECEIVER WITH THE C-
11702/UR CONTROL DISPLAY UNIT INSTALLED, PLACE A COPY OF
THIS MESSAGE IN THE PILOTS READING FILE AND THE AIRCRAFT
OPERATORS MANUAL. SEE PARAGRAPH 9 FOR CORRECTION
PROCEDURES.
B. IF IT IS NOT THE AN/ASN-149 RECEIVER(V1) RECEIVER
WITH THE C-11702/UR CONTROL DISPLAY UNIT INSTALLED, THE
INSPECTION IS COMPLETED AND NO FURTHER ACTION IS REQUIRED
EXCEPT RECORDING AND REPORTING COMPLIANCE WITH THIS ASAM IAW
PARAGRAPH 14A BELOW.
9. CORRECTION PROCEDURES - THE FOLLOWING ARE POSSIBLE
CORRECTIVE ACTIONS.
A. THERE ARE TWO PARTIAL WORK AROUND PROCEDURES:
(1) WHEN THE CDU LOCKS-UP (CANNOT SWITCH TO ANOTHER
PAGE)
-- SWITCH TO THE "OFF" POSITION
-- TURN TO THE DESIRED PAGE
-- SWITCH BACK TO "NAV" POSITION
THE SET SHOULD RE-ACQUIRE THE SATELLITES WITHIN ABOUT 30
SECONDS. IF PRN 30 IS NOT ONE OF THE FOUR SATELLITES BEING
TRACKED, YOU ARE THEN ABLE TO SWITCH BACK AND FORTH TO OTHER
PAGES UNTIL THE RECEIVER QUERIES PRN 30 AGAIN. THE CDU WILL
IMMEDIATELY LOCK-UP ON THE NEW PAGE IF THE RECEIVER IS
TRACKING PRN 30, SO YOU MUST REPEAT THE PARAGRAPH 9A(1)
PROCEDURE TO CHANGE PAGES AGAIN.
NOTE:
THE RECEIVER WILL CONTINUE TO NAVIGATE WHEN LOCKED UP.
HOWEVER, YOU CAN CHANGE PAGES BY GOING THRU THE ABOVE
PROCEDURE.
(2) FOR CH-47D. THE RECEIVER WILL OPERATE IN
"DOPPLER ONLY" MODE IF BOTH OF THE ANTENNA INPUTS (J3 AND
J4) ARE DISCONNECTED AT THE AN/ASN-149 RECEIVER PROCESSOR
UNIT (RPU) IN THE AVIONICS BAY. NOTE THAT YOU WILL NO
LONGER HAVE THE ACCURACY OF A SYSTEM INTEGRATED WITH GPS,
BUT YOU CAN UPDATE MANUALLY. THE DOPPLER ACCURACY DEGRADES
WITH DISTANCE TRAVELED.
(3) FOR RC-12 SERIES WITH THE AN/ASN-149(V1)
INTEGRATED INTO THE AIRCRAFT SURVIVABILITY EQUIPMENT/AVIONICS
CONTROL SYSTEM. RECYCLE AN/ASN-149(V1) POWER BY PULLING
THE CIRCUIT BREAKER ON THE POWER CABINET LABELED CB25 GPS.
RESET AFTER A FEW MOMENTS. MONITOR THE MISSION ANNUNCIATOR
PANEL TO ENSURE THE GREEN "INS UPDATE" LIGHT STAYS
ILLUMINATED. CHECK THE GPS SETUP PAGE TO CONFIRM THE PAGE
HAS UNLOCKED AND ALL LINE BUTTON FUNCTIONS ARE AVAILABLE.
B. SPACECOM MAY CHANGE SATELLITE PRN
30 TO ANOTHER
PRN. THIS HAS BEEN SUCCESSFULLY DONE BEFORE FOR SIMILAR REASONS.
IF THIS ACTION IS TAKEN THIS MESSAGE WILL BE RESCINDED.
C. A SOFTWARE CHANGE TO THE AN/ASN-149(V1) RECEIVERS
WILL ELIMINATE THE PROBLEM. THIS IS A LONG TERM FIX THAT
WILL TAKE APPROXIMATELY 12-18 MONTHS TO COMPLETE.
D. SATELLITE PRN 30 WILL BE ABOVE THE HORIZON IN THE
VIEWING AREAS LISTED DURING THE FOLLOWING APPROXIMATE (TO
THE NEAREST 5 MINUTES) LOCAL TIME PERIODS:
RISE 1-SET 1 RISE 2-SET 2
HUNTER AAF GA 7 APR 97 0125 - 0635 1730 - 2220
N 32 00 40 14 APR 97 0055 - 0605 1700 - 2150
W 081 08 45 21 APR 97 0025 - 0535 1630 - 2120
EST, ZULU -5 28 APR 97 0000 - 0505 1605 - 2055
CAMPBELL AAF KY 7 APR 97 0055 - 0535 1610 - 2115
N 36 40 22 14 APR 97 0025 - 0505 1545 - 2045
W 087 29 30 21 APR 97 2350 - 0435 1515 - 2015
CST, ZULU -6 28 APR 97 2325 - 0405 1445 - 1950
FT RUCKER AL 7 APR 97 0030 - 0525 1625 - 2130
N 31 19 17 14 APR 97 0000 - 0455 1555 - 2100
W 085 26 59 21 APR 97 2330 - 0425 1530 - 2035
CST, ZULU -6 28 APR 97 2300 - 0355 1500 - 2005
FT. BRAGG, NC 7 APR 97 0035 - 0540 1625 - 2105
N 35 14 APR 97 0005 - 0515 1600 - 2035
W 079 21 APR 97 2330 - 0445 1530 - 2005
CST, ZULU -6 28 APR 97 2300 - 0415 1500 - 1940
CAMP HUMPHREY 7 APR 97 0325 - 0930 2000 - 2245
S. KOREA 14 APR 97 0255 - 0905 1930 - 2215
N37, E 127 21 APR 97 0225 - 0835 1900 - 2145
SEOUL, ZULU +9 28 APR 97 0155 - 0805 1830 - 2120
GEBELSTAT GERMANY 7 APR 97 0830 - 1535 NONE
N 49 30 14 APR 97 0800 - 1505 NONE
E 008 30 21 APR 97 0730 - 1435 NONE
BERLIN, ZULU +1 28 APR 97 0700 - 1405 NONE
VENICE, ITALY 7 APR 97 0830 - 1545 NONE
N 46 02 30 14 APR 97 0800 - 1515 NONE
E 012 36 12 21 APR 97 0730 - 1445 NONE
ROME, ZULU +1 28 APR 97 0700 - 1415 NONE
HOWARD AFB PANAMA 7 APR 97 1825 - 0545 NONE
N 08 54 14 APR 97 1755 - 0515 NONE
W 079 35 21 APR 97 1725 - 0445 NONE
EST, ZULU -5 28 APR 97 1700 - 0415 NONE
FAIRBANKS, AK 7 APR 97 0005 - 0315 1115 - 1715
N 64 50 15 14 APR 97 2335 - 0235 1045 - 1650
W 147 36 52 21 APR 97 2305 - 0215 1020 - 1620
AK STD, ZULU -9 28 APR 97 2235 - 0145 0950 - 1550
GRAY AAF, WA 7 APR 97 0040 - 0325 1255 - 1905
N 47 05 14 APR 97 0010 - 0255 1225 - 1835
W 122 35 21 APR 97 2335 - 0225 1200 - 1810
PST, ZULU -8 28 APR 97 2310 - 0155 1130 - 1740
GRAND PRAIRIE, TX 7 APR 97 0105 - 0510 1605 - 2140
N 32 42 14 APR 97 0040 - 0445 1535 - 2110
W 097 10 21 APR 97 0010 - 0415 1505 - 2045
CST, ZULU -6 28 APR 97 2335 - 0345 1440 - 2015
LEXINGTON, OK 7 APR 97 0115 - 0520 1600 - 2130
N 35 18 14 APR 97 0045 - 0450 1530 - 2105
W 097 34 21 APR 97 0015 - 0420 1500 - 2035
CST, ZULU -6 28 APR 97 2345 - 0350 1430 - 2005
FT POLK, LA 7 APR 97 0050 - 0515 1615 - 2145
N 31 02 43 14 APR 97 0020 - 0445 1545 - 2115
W 093 11 21 21 APR 97 2350 - 0415 1515 - 2045
CST, ZULU -6 28 APR 97 2320 - 0345 1445 - 2015
FT IRWIN, CA 7 APR 97 0020 - 0250 1325 - 1940
N 35 30 14 APR 97 2350 - 0220 1255 - 1910
W 116 45 21 APR 97 2320 - 0150 1225 - 1840
PST, ZULU -8 28 APR 97 2250 - 0120 1155 - 1810
THESE ARE THE APPROXIMATE LOCAL TIMES BASED ON THE MOST
CURRENT USCG ALMANAC FILE DATED 14 MAR 97 THAT PRN 30 IS
ABOVE THE HORIZON IN A PARTICULAR LOCATION. THE GPS
RECEIVER WILL NOT ALWAYS TRACK PRN 30 DURING THESE TIMES.
FOR DATES BETWEEN THOSE LISTED, INTERPOLATE FROM THE GIVEN
TIME. THE TIME SHIFTS BACKWARD ABOUT 1/2 HOUR PER WEEK OR
ABOUT 4 MINUTES A DAY. THESE TIME SHIFTS ARE APPROXIMATE,
ACTUAL TIME SHIFTS FOR YOUR LOCATION SHOULD BE VERIFIED
THROUGH PM-GPS. COMMANDERS NEEDING SATELLITE PROFILES FOR A
PARTICULAR MISSION REQUIREMENT SHOULD CONTACT PM-GPS DURING
MISSION PLANNING. PM-GPS HAS A SOFTWARE PROGRAM THAT CAN BE
USED TO DETERMINE WHEN A SATELLITE IS IN VIEW FOR ANY
LOCATION IN THE WORLD. TO OBTAIN A PROFILE FOR ANY SPECIFIC
LOCATION PM-GPS WILL NEED THE LAT/LONG COORDINATES AND TIME
ZONE. CONTACT MR. FRANK ROWE OR MR. JOHNNY WALKER, SFAE-C3S-
GPS-GFO, DSN 468-5058/3288 OR COMMERCIAL 912/926-5058/3288,
EMAIL: "ROWE (AT SIGN) JSSMO.ROBINS.AF.MIL"; DATAFAX IS DSN
468-9091 OR COMMERCIAL 912/926-9091
10. SUPPLY/PARTS AND DISPOSITION - 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 .5 MANHOURS USING 1 PERSON.
(2) NO DOWNTIME FOR THE 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 - N/A.
13. REFERENCES -
A. TM 55-1520-240-10
B. TM 1-1510-219-10
C. TM 1-1510-220-10
D. TM 1-1510-221-10
E. TM 1-1510-222-10
F. TM 1-1510-223-10
G. TM 1-1510-224-10
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 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. 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 POINTS OF CONTACT FOR THIS MESSAGE ARE:
CH-47 - MR. CURTIS STEVENS, AMSAT-R-ECC, DSN 693-6679 OR
COMMERCIAL 314/263-6679; RC-12 - MR. TIM KROLL, AMSAT-R-ECF,
DSN 693-0424 OR COMMERCIAL 314/263-0424; OR AVIONICS - MR.
JOEL WILL, AMSAT-R-ESE, DSN 693-1635 OR COMMERCIAL 314/263-
1635.
B. LOGISTICAL POINTS OF CONTACT FOR THIS MESSAGE ARE:
PM CH-47 - MR. NORM HUSTON, AMCPM-CH-L, DSN 693-1415 OR
COMMERCIAL 314/263-1415; PM FIXED WING - JOHN LANIER, DRC
AMCPM-FW, DSN 693-2061 OR COMMERCIAL 314/263-2061.
C. FORMS AND RECORDS POINT OF CONTACT FOR THIS MESSAGE
IS MS. ANN WALDECK, AMSAT-I-MDM, DSN 490-2318 OR COMMERCIAL
314/260-2318.
D. SAFETY POINT OF CONTACT FOR THIS MESSAGE IS MR.
MIKE HEARD, AMSAT-R-X, DSN 693-1591 OR COMMERCIAL 314/263-
1591.
E. FOREIGN MILITARY SALES (FMS) RECIPIENTS REQUIRING
CLARIFICATION OF ACTION ADVISED BY THIS MESSAGE SHOULD
CONTACT CW5 JAY NANCE OR MR. RON VAN REES, AMSAT-D-S, DSN
693-7844/3216 OR COMMERCIAL 314/263-7844/3216. DATAFAX IS
DSN 693-2917.(ST. LOUIS IS GMT MINUS 6 HRS)
F. AFTER HOURS CONTACT ATCOM COMMAND OPERATIONS CENTER
(COC) DSN 693-2066/7 OR COMMERCIAL 314/263-2066/7.
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