JOINT FLEET MAINTENANCE MANUAL

APPENDIX K
COMFLTFORCOMINST 4790.3 REV A CH-3
SAMPLE TYCOM MESSAGE TO PCU CONCERNING USE OF THE FBW SCS IN SUPPORT OF
ALPHA SEA TRIALS (SUBMARINES)
FROM: COMSUB//
TO: PRECOMUNIT //
INFO CNO WASHINGTON DC
COMNAVSEASYSCOM WASHINGTON DC
COMFLT
COMSUBGRU
COMSUBRON
BT
UNCLAS // N09094 //
MSGID/GENADMIN/COMSUB//
SUBJ/(SUBS) PRECOMUNIT AUTHORIZATION TO USE THE FLY-BY-WIRE SHIP
CONTROL SYSTEM IN SUPPORT OF ALPHA SEA TRIALS//
REF/A/MSG/COMNAVSEASYSCOM/// {G.2.2}
REF/B/MSG////{G.2.3}
REF/C/LTR/COMSUB///
REF/D/LTR/NAVSEA///
REF /E/LTR NAVSEA SERNO./DATE
NARR/REF A IS NAVSEA FLY-BY-WIRE SHIP CONTROL SYSTEM MATERIAL CONDITION READINESS
REPORT AND ALPHA SEA TRIALS RECOMMENDATION FOR . REF B IS
REPORT OF FAST CRUISE COMPLETION AND READINESS OF FLY-BY-WIRE
SHIP CONTROL SYSTEM FOR ALPHA SEA TRIALS. REF C CONCURRED WITH THE SEA TRIALS
AGENDA. REF D APPROVED THE SEA TRIALS AGENDA.//
RMKS/1. REF A CERTIFIED THE FLY-BY-WIRE SHIP CONTROL SYSTEM MATERIAL CONDITION OF
SATISFACTORY FOR ALPHA SEA TRIALS.
2. REF B REPORTED SUCCESSFUL COMPLETION OF FAST CRUISE AND READINESS OF FLY-BY-
WIRE SHIP CONTROL SYSTEM FOR ALPHA SEA TRIALS.
3. FLY-BY-WIRE SHIP CONTROL SYSTEM USE IS AUTHORIZED IN SUPPORT OF
ALPHA SEA TRIALS IAW THE ALPHA SEA TRIALS AGENDA CONCURRED IN BY REF C AND
APPROVED BY REF D. THERE ARE NO FLY-BY-WIRE SHIP CONTROL SYSTEM or SHIP RELATED
OPERATING RESTRICTIONS/LIMITS WHICH HAVE NOT BEEN SATISFIED. //
4. THIS CERTIFICATION IS VALID THROUGHOUT TRIALS UNLESS A DEFICIENCY HAS BEEN
DISCOVERED. SHIP SPEED IS RESTRICTED TO LESS THAN 20 KNOTS WHEN A FBW SCS FAULT
CONDITION RESULTS IN A MAJOR NON-CONFORMANCE AFFECTING CONTROL OF SHIPS PITCH,
HEADING, DEPTH OR CONTROL SURFACES. THESE DEFICIENCIES MUST BE REPORTED TO
NAVSEA AND THE APPROPRIATE FLEET AND TYPE COMMANDERS. PREVIOUS NAVSEA
CERTIFICATION OF THE FBW SCS MATERIAL CONDITION SHALL BE SUSPENDED UNTIL NAVSEA
REVIEWS THE REPORT AND CERTIFIES TO THE TYCOM THAT THE FBW SCS MATERIAL CONDITION
IS SATISFACTORY FOR SEA TRIALS IN ACCORDANCE WITH THE SEA TRIAL AGENDA APPROVED
BY REFERENCE D. THE SHIP'S SPEED IS RESTRICTED TO LESS THAN 20 KNOTS UNTIL
SATISFACTORY RESOLUTION OF THE MAJOR NON-CONFORMANCE AND TYCOM APPROVAL TO
OPERATE THE FBW SCS TO PREVIOUSLY AUTHORIZED CONDITIONS IS GRANTED, UNLESS
SPECIFICALLY ADDRESSED IN THE SEA TRIAL AGENDA.
BT
NOTE: ENSURE MESSAGES ARE IN ACCORDANCE WITH NTP-3 FORMAT AND CURRENT
PLAD IS UTILIZED.
I-2K-1