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ADMINISTRATIVE MESSAGE
ROUTINE
R 042017Z APR 96 ZYB
FM AEGIS PROG MGR WASHINGTON DC//PMS400F9//
TO COMNAVSURFLANT NORFOLK VA//N6/N8/N43/N432/N434/N431A4//
COMNAVSURFPAC SAN DIEGO CA//N6/N8/N43/N431/N432/N434/N43114//
NAVSURFWARCEN SHIPSYSENGSTA PHILADELPHIA PA//623/625//
NAVSHIPYD LONG BEACH CA//250.1//
INFO COMNAVSEASYSCOM WASHINGTON DC//
PMS400F971/03M2/03P/00/91//
AIG SIX EIGHT FOUR NINE
UNCLAS //N09070//
MSGID/GENADMIN/NAVSEA PMS335TH/SERXXXX//
SUBJ/FFG 7 CLASS ADVISORY NO. 06-95 REV 1, SUPERSTRUCTURE
WELDING//
REF/A/MSG/NAVSEA/261128ZAPR95/-/NOTAL//
REF/B/LTR/NSWCCD-SSES/26JAN96/-/NOTAL//
REF/C/LTR/NAVSEA/19DEC94//
REF/D/DOC/NAVSEA/-//
REF/E/DOC/NAVSEA/23NOV90//
NARR/REF A IS FFG 7 CLASS ADVISORY NO. 06-95, SUPERSTRUCTURE
WELDING. REF B IS CODE 625 FAX, MODIFICATION OF CLASS ADVISORY
06-95. REF C IS FFG 7 CLASS AER NO. 13-94, PASSIVE COUNTERMEASURES
(PCMS) MATERIAL AND NON-SKID REMOVAL FOR SUPERSTRUCTURE CRITICAL WELD
INSPECTION, SERIAL NUMBER 335TH/9940. REF D IS NAVSEA DWG
150-5604994: QUALITY ASSURANCE REQUIREMENT FOR SHIPALT 146K. REF E
IS MIL-STD-1689A (SH).//
POC/J. STONE/-/LOC:ARLINGTON VA/TEL:DSN 332-5660 X204/TEL:
(703) 602-5660 X204//
RMKS/1. THIS CLASS ADVISORY REVISION PROVIDES GUIDANCE CONCERNING
/096 1 OF 4 042017Z APR 96
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ALL WELD REPAIRS AND NEW WELDING ON FFG 7 SUPERSTRUCTURES. THIS
REVISION SUPERSEDES AND CANCELS REF A.
2. BACKGROUND:
A. HISTORICALLY, THE SUPERSTRUCTURE ON FFG 7 CLASS SHIPS HAS
EXPERIENCED EXTENSIVE CRACKING. THE CAUSE OF THE CRACKING HAS BEEN
DETERMINED TO BE A COMBINATION OF HIGH DESIGN STRESS COUPLED WITH
POOR QUALITY WELDING. IN SEVERAL CASES CRACKS HAVE SPREAD ACROSS THE
02 LEVEL WEATHERDECK. THE MOST PREVALENT CRACKING OCCURS AT FRAME
200.5 ON THE 02 LEVEL.
B. SHIPALT FFG 7-86K WAS FIRST INTRODUCED TO ALLEVIATE CRACKING
PROBLEMS. THIS SHIPALT WAS NOT COMPLETELY SUCCESSFUL. THEREFORE,
SHIPALT FFG 7-146K WAS DEVELOPED AND IMPLEMENTED. SHIPALT 146K
INCORPORATES MORE STRINGENT QUALITY ASSURANCE MEASURES AND WELDING
PROCEDURES.
C. DUE TO CONCERN THAT THE HIGH STRESSES AND POOR QUALITY
WELDING MAY PRODUCE CRACKING AT OTHER AREAS OF THE FFG 7 CLASS
SUPERSTRUCTURE, POST SHIPALT 146K INSTALLATIONS SHIP CHECKS HAVE BEEN
UNDERTAKEN BY NSWCCD-SSES AND LBNSY TO MONITOR THE EFFECTIVENESS OF
THE ALTERATION. TO ASSIST NSWCCD-SSES AND LBNSY AND ALLOW FOR SHIPS
FORCE INSPECTION OF CRITICAL WELD AREAS, REF C WAS DEVELOPED. THIS
AER CALLS FOR THE PERMANENT REMOVAL OF PCMS AND NON-SKID FROM
CRITICAL WELD AREAS IDENTIFIED DURING POST SHIPALT 146K INSTALLATION
SHIP CHECKS. REMOVAL OF THE SPECIFIED PCMS MATERIAL WILL NOT
ADVERSELY AFFECT THE PERFORMANCE OF THE REMAINDER OF THE COATING.
D. GOOD WELD QUALITY IS MANDATORY IN THE PRESENCE OF THE HIGH
DESIGN STRESS AREAS SUCH AS FOUND ON THE FFG 7 02 LEVEL. ACHIEVING
GOOD QUALITY WHEN WELDING ALUMINUM REQUIRES METICULOUS ADHERENCE TO
CLEANLINESS REQUIREMENTS AND ALUMINUM WELDING PROCEDURES. POOR
ALUMINUM WELDING WILL CRACK.
3. ACTION:
A. IN RESPONSE TO REF B, ALL FFG 7 CLASS SUPERSTRUCTURE
WELDING IN CRITICAL AREAS SHALL CONFORM TO REF D. THIS INCLUDES ALL
INTERIOR ATTACHED WELDMENTS TO THE DECK OR DECKHOUSE INCLUDING TEE
BEAMS, PIPE HANGER WELDS, CABLE SUPPORT WELDS, AND ANY OTHER
ATTACHMENTS TO THE INSIDE OR OUTSIDE OF THE SHIP STRUCTURE. CRITICAL
AREAS ARE DEFINED AS FOLLOWS:
(1) SHIP STRUCTURE EXPOSED TO THE WEATHER FROM THE MAIN
DECK TO THE 02 LEVEL BETWEEN FRAMES 176 AND 204.
(2) SHIP STRUCTURE EXPOSED TO THE WEATHER FROM THE 02
LEVEL EXTENDING 5 FEET BELOW THE 02 LEVEL AND LOCATED:
(A) BETWEEN FRAMES 204 AND 212.
(B) BETWEEN FRAMES 218 AND 222.
(C) BETWEEN FRAMES 228 AND 230.
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(3) SHIP STRUCTURE EXPOSED TO THE WEATHER BETWEEN FRAMES
204 AND 230 TO WHICH ANY ONE OF THE FOLLOWING CRITERIA APPLY:
(A) WITHIN 2 FEET OF ANY TRANSVERSE BUTT WELD ON THE
02 LEVEL.
(B) ANY DECK CRACK OVER A LONGITUDINAL STIFFINER.
(C) ALL PREVIOUSLY REPAIRED CRACKS.
(D) ANY CRACK OVER 6 INCHES IN LENGTH.
B. ALL OTHER FFG 7 CLASS SUPERSTRUCTURE WELDING SHALL BE IN
ACCORDANCE WITH QUALITY ASSURANCE REQUIRMENTS OF REF E.
C. TACK WELDING ON CRITICAL WELD AREAS OF THE SUPERSTRUCTURE
AND CORRESPONDING INTERIOR OVERHEADS AND BULKHEADS IS PROHIBITED.
SUPERSTRUCTURE CRITICAL WELD AREAS ARE DEFINED IN PARA 3.A.
D. SHIPS FORCE SHALL REPORT TO ORIG AND NSWCCD-SSES (625) ANY
CRACKS IN THE SUPERSTRUCTURE CRITICAL WELD AREA FOUND DURING NORMAL
ROUTINE INSPECTION.
E. SHIPS FORCE SHALL ACCOMPLISH REF C AT THE EARLIEST WINDOW OF
OPPORTUNITY.
4. FOR COMNAVSURFLANT/COMNAVSURFPAC - RECOMMEND:
A. TASKING FFG 7 CLASS SHIPS TO ADHERE TO PARA 3 ACTIONS.
B. TASKING IMA ACTIVITIES TO ADHERE TO PARA 3 ACTIONS.
5. FOR LBNSY (CODE 250.1) - ENSURE ALL SHIP ALTERATIONS UNDER
DEVELOPMENT, WHICH REQUIRE SUPERSTRUCTURE WELDING, CONFORM TO PARA 3
ACTION GUIDANCE.
6. FOR SUPSHIPS - ENSURE PARA 3 ACTION GUIDANCE IS ADHERED TO PRIOR
TO AND DURING INSTALLATION OF SHIPALT FFG 7-146K.
7. THIS CLASS ADVISORY HAS NO IMPACT ON EOSS, PMS OR CMP. IT WILL
BE CANCELED AT THE DISCRETION OF THE ORIG AND CNSL/CNSP.
8. NAVSEA POC IS JOHN STONE, PMS400F971, DSN 332-5660 X204 OR COMM
(703) 602-5660 X204.//
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*** MDS office codes that have initially received this message: ***
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FLASH
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FM NAVSURFWARCEN SHIPSYSENGSTA PHILADELPHIA PA//9760/9780/1134//
TO COMNAVSURFLANT NORFOLK VA
//N43/N431/N431A/N431A5/N43A25/N434//
COMNAVSURFPAC SAN DIEGO CA//N43/N431/N43113/N43111//
INFO COMNAVSEASYSCOM WASHINGTON DC//03W4/03W4H/04TD//
AEGIS PROG MGR WASHINGTON DC//PMS400F5/D4//
NAVSURFWARCENDIV PORT HUENEME CA//5B31//
SIMA SAN DIEGO CA//JJJ//
FTSCLANT NORFOLK VA//4324//
FTSCPAC SAN DIEGO CA//306//
PERA PHILADELPHIA PA//JJJ//
SUPSHIP BATH ME//JJJ//
SUPSHIP PASCAGOULA MS//100/200/150TC20//
AEGIS TRASUPPGRU NORFOLK VA//AHET//
AEGIS TRASUPPGRU MAYPORT FL//AHET//
AEGIS TRASUPPGRU YOKOSUKA JA//AHET//
COMNAVSURFGRU MIDPAC//MP44//
UNCLAS //N09570//
MSGID/GENADMIN/NSWCCD-SSES 9760//
SUBJ/CG-47 CLASS AMMUNITION ELEVATOR HATCH GUARDLINES//
REF/A/DOC/FTSCPAC/17AUG95//
REF/B/TEL/NSWCCD-SSES/22NOV95//
REF/C/MEM/NSWCCD-SSES/11DEC95//
REF/D/TEL/NSWCCD-SSES/13DEC95//
REF/E/TEL/NSWCCD-SSES/11JAN96//
REF/F/DOC/NAVSEA/01MAR88//
REF/G/DOC/NAVSEA/01APR92//
/096 1 OF 3 041610Z APR 96
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NARR/REF A IS A FTSCPAC ELEVATOR ASSESSMENT REPORT LETTER OF 17 AUG
95 FOR THE CG-57. REF B WAS A TELCON BTWN NSWCCD-SSES 9760 (M.
LACKOVIC)/SIMA SAN DIEGO (BMC HOLCOMB). REF C IS AN E-MAIL MEMO BTWN
NSWCCD-SSES 9760 (M. LACKOVIC)/NSWCCD-SSES 9780 (M. ROWE). REF D WAS
A TELCON BTWN NSWCCD-SSES 9760 (M. LACKOVIC)/NAVSEA 03W4 (L. WANEX).
REF E WAS A TELCON BTWN NSWCCD-SSES 9760 (M. LACKOVIC)/INGALLS
WASHINGTON TECHNICAL OFFICE (N. BUFFLER). REF F IS A NAVSEA SAFETY
BULLETIN FROM MARCH 1988. REF G IS CG-47 CLASS ELEVATOR TECHNICAL
MANUAL SG818-BQ-MMM-010, REV 1.//
POC/M. LACKOVIC/GS-12/NSWCCD-SSES 9760/-/TEL:DSN 443-7359
/TEL:(215) 897-7359//
RMKS/1. THE PURPOSE OF THIS MESSAGE IS TO INFORM ALCON ABOUT THE
PROPER MATERIAL THAT IS TO BE USED FOR THE GUARDLINES AROUND CG-47
CLASS AMMUNITION ELEVATOR HATCHES.
2. BACKGROUND: REF A CITED THE USE OF KEVLAR FOR THE REPLACEMENT OF
THE GUARDLINES ON THE CG-57 FWD AMMUNITION ELEVATOR. REF B WAS A
REQUEST FROM SIMA SAN DIEGO AS TO WHAT THE PROPER MATERIAL SHOULD BE
FOR THE GUARDLINES ON THE CG-57. SIMA SAN DIEGO WAS AWARE OF OTHER
CG'S THAT HAVE EITHER SAFETY CHAINS OR POLYESTER ROPE AS THE MATERIAL
USED FOR THE HATCH GUARDLINES AND WERE ASKING FOR CLARIFICATION ON
THE PROPER MATERIAL. REF C ASKED FOR CLARIFICATION ON THE USE OF
SAFETY CHAINS AROUND OPEN HATCHES. MR. ROWE, AS THE HULL OUTFITTING
LCEM REP, STATED THAT IN THE CASE WHERE YOU WILL ONLY HAVE THE
STANCHIONS UP IN A TEMPORARY SITUATION, YOU CAN AND SHOULD USE CHAIN
WITH SNAP HOOKS (PREFERABLY WICHARD). THE USE OF CHAINS IS
ACCEPTABLE BECAUSE THESE ARE TEMPORARILY ERECTED STANCHIONS. REF D
WAS A CLARIFICATION OF TERMINOLOGY WRT GUARDLINES. MR. WANEX DEFINED
GUARDLINES AS A QUICK-ACTING REMOVABLE INSTALLATION AND THEY SHOULD
BE A SINGLE COURSE OF MATERIAL. REF E WAS A TELCON CONCERNING
WHETHER INGALLS HAD DEVELOPED AN ECP OR SHIPALT TO REPLACE THE SAFETY
CHAINS THAT ARE USED AROUND THE ELEVATOR HATCHES WITH POLYESTER ROPE.
ECP 47-4069 (R3) (TOPSIDE BONDING AND GROUNDING), DATED 1 SEP 88, WAS
DEVELOPED BY INGALLS TO REDUCE EMI AND BROAD BAND NOISE PROBLEMS ON
CG59-73. THIS ECP HAS VARIOUS CHANGES IN IT CONCERNING LIFELINES,
LIFERAILS, AND IT DID REPLACE TOPSIDE CHAINS AND NYLON GUARDLINES
WITH POLYESTER ROPE. REF F STATED THE CORRECT MATERIAL FOR POLYESTER
GUARDLINES IS 5/8 INCH DIAMETER, THREE STRAND POLYESTER ROPE PER
MIL-R-30500. THE SAFETY BULLETIN ALSO STATED THAT THE POLYESTER ROPE
GUARDLINES SHOULD BE ATTACHED USING APPROVED WICHARD SNAPHOOKS.
3. ACTION: WE RECOMMEND THAT CG-47 CLASS ELEVATOR HATCH
GUARDLINES BE MADE FROM POLYESTER ROPE. SOME SHIPS MAY STILL HAVE
/096 2 OF 3 041610Z APR 96
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SAFETY CHAINS OR KEVLAR GUARDLINES INSTALLED AND THIS IS ACCEPTABLE
UNTIL THEY MUST BE REPLACED. WHEN GUARDLINES ARE DETERMINED TO BE IN
NEED OF REPLACEMENT, THEY ARE TO BE REPLACED WITH THE FOLLOWING
MATERIAL:
A. A SINGLE COURSE OF POLYESTER ROPE, 5/8 INCH DIA, THREE
STRAND, PER MIL-R-30500.
B. WICHARD SNAP HOOKS, NSN: 5340-01-282-5661.
4. THE CURRENT IN-SERVICE LIMIT REFERS TO QUOTE, LIFELINES, END
QUOTE, AROUND FLIGHT AND HANGAR DECK OPENING HATCHES. WE WILL
ADDRESS THE NOMENCLATURE WITH NAVSEA AND REVISE TO GUARDLINES FOR THE
NEXT REVISION OF NSTM 772. THE MINIMUM HEIGHT OF THE GUARDLINE CAN
BE NLT 36 INCHES AT THE LOW POINT OF THE CATENARY.
5. REF G WILL BE REVISED TO REFLECT THE CORRECT MATERIAL
REQUIREMENTS FOR THE GUARDLINES. WE HAVE ADDED REF G TO THE NAVSEA
TECHNICAL MANUAL DEFICIENCY/EVALUATION PROGRAM. NSWCCD-SSES FEEDBACK
T15395 APPLIES.
6. EOSS DOES NOT APPLY TO AMMUNITION ELEVATORS.
7. FOR COMNAVSURFLANT/COMNAVSURFPAC: RECOMMEND CG-47 CLASS SHIPS BE
ADVISED OF PARA 3 GUIDANCE.//
BT
*** MDS office codes that have received this message: ***
00 100.01 120 130 140
160 200 210 220 230
300 300.05 300MH 310 310ML
320DC 330 330JH 330TL 400
410 420 430 500 500EM
510 510GH 510MA 520 520WB
530 530PT 530TS MDSOPR
/096 3 OF 3 041610Z APR 96
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