N646NN
Registered owner: AMERICAN AIRLINES INC, TX (owner ≠ operator)
Operators of this aircraft
Who operated this tail, and how firmly we know it.
No operator established for this aircraft.
Accident & incident history
No NTSB accidents or incidents on file for this aircraft.
Maintenance disclosures
Service Difficulty Reports filed with the FAA for this airframe. Filing is largely voluntary — the number of reports is not a measure of reliability. To verify a report, search its control number at the FAA SDRS site.
36 reports on file, 2026-01-28 – 2026-08-17.
Part: TIRE — BLOWN (ZONE 700) · airframe 14,382 hrs · 14,589 cycles
RIGHT INBD MLG TIRE BLOWN. REMOVED AND INSTALLED RT INBD MLG WHEEL & TIRE ASSY IAW AMM 32-41-01-000/400-801-A01-PSA.
Part: PCB — UNSERVICEABLE (ZONE 700) · airframe 13,678 hrs · 14,067 cycles
GEAR DISAGREE WARNING ON TAKE WITH LDG GEAR LEVER UP. REMOVED AND REPLACED JB-10 PCB-5 IAW AMM 24-05-11-000/400-801-A01. OPS TEST GOOD AT THIS TIME. PERFORMED EXTENSION AND RETRACTION OF NLG AND MLGS IAW AMM 32-30-865-801-A01. CYCLED 10 TIMES AND FAULTS/MSGS DID NOT REAPPEAR.
Part: HYDRAULIC LINE — CORRODED (ZONE 600) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION FOUND ON THE THREE HYDRAULIC LINES AND ELECTRICAL HARNESSES SUPPORTS ON RH MLG WHEEL WELL FORWARD SIDE. HYDRAULIC LINES SUPPORTS BRACKETS 3 E/A'S, FS797 (RT MLG WHEEL WELL) WERE REPLACED PER SRM 51-42-06-001-001-A01, SRM 51-42-21-001-001-A01 AND SRM 51-41-02-001-001-A01.
Part: ANGLE — CORRODED (ZONE 800) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON KICKPLATE ANGLE AT DOOR (L1) SURROUND STRUCTURE. DUE TO EXCESSIVE DAMAGE ON KICKPLATE ANGLE AT DOOR (L1) SURROUND STRUCTURE WAS REPLACED PER CRJ-900 SRM 51-10-06-001-001-A01, SRM 51-42-06-001-001-A01 AND SRM 51-42-21-001-001-A01.
Part: ANGLE — CORRODED (ZONE 800) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON MIDCAP ANGLE AT DOOR (L1) SURROUND STRUCTURE. MIDCAP ANGLE AT DOOR (L1) SURROUND STRUCTURE WAS REPLACED PER CRJ-900 SRM 51-42-06-001-001-A01, SRM 51-42-21-001-001-A01 AND SRM 51-41-02-001-001-A01"
Part: ANGLE — CORRODED (ZONE 200) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON MIDCAP ANGLE AT DOOR (L1) SURROUND STRUCTURE. MIDCAP ANGLE AT DOOR (L1) SURROUND STRUCTURE WAS REPLACED PER CRJ-900 SRM 51-42-06-001-001-A01, SRM 51-42-21-001-001-A01 AND SRM 51-41-02-001-001-A01.
Part: SKIN — CORRODED (ZONE 100) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON EXTERNAL SKIN OF FUSELAGE ON STGR 16RH BTW FS629.00 & FS645.00, FS661.00+16.00 & FS661.00+32.00 BTW STGR 26RH & STGR 27, FS661.00+16.00 BTW STGR 3RH & STGR 3LH AND FS1015.00 & FS1031.00 BTW STGR 23RH & STGR 24RH. CORROSION ON EXTERNAL SKIN OF FUSELAGE ON FS661.00+16.00 & FS661.00+32.00 BTW STGR 26RH & STGR 27, FS661.00+16.00 BTW STGR 3RH & STGR 3LH WAS REMOVED AND EVALUATED WITHIN OF LIMITS PER 51-21-06-001-001-A01 AND SRM 53-00-01-101-001-A01, FIGURE 53-00-01-991-803 AND FIGURE 53-00-01-991-807. EXTERNAL SKIN ON STGR 16RH BTW FS629.00 & FS645.00 WAS REPAIRED PER REO 690-53-31-1094 REV. --. AND EXTERNAL SKIN ON FS1015.00 & FS1031.00 BTW STGR 23RH & STGR 24RH WAS REPAIRED PER REO 690-53-6
Part: HYDRAULIC LINE — CORRODED (ZONE 500) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON THE HYDRAULIC LINES AND ELECTRICAL HARNESSES SUPPORTS (3EAS) AT LH MLG WW. HYDRAULIC LINES AND ELECTRICAL HARNESSES SUPPORTS (3EAS) AT LH MLG WHEEL CRJ-900 SRM 51-42-21-001-001-A01, SRM 51-42-06 001-001-A01 AND SRM 51-41-02-001-001-A01.
Part: BRACKET — CORRODED (ZONE 100) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON BRACKET'S MACHINED BTW FS 515 STGR 22LH TO STGR 23LH, FS 515 STGR 26LH TO STGR 27,FS 629 STGR 26LH TO STGR 27,FS 661+8 STGR 22LH TO 23LH AND FS 661+8 STGR 26LH TO STGR 27 AT FWD BAGGAGE COMPARTMENT. BRACKET'S MACHINED BTW FS 515 STGR 22LH TO STGR 23LH, FS 515 STGR 26LH TO STGR 27,FS 629 STGR 26LH TO STGR 27,FS 661+8 STGR 22LH TO 23LH AND FS 661+8 STGR 26LH TO STGR 27 AT FWD BAGGAGE COMPARTMENT WERE REPLACED PER CRJ-900 SRM 51-42-22-001-001-A01, SRM 51-42-21-001-001-A01
Part: FITTING — CORRODED (ZONE 100) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON FITTINGS 2EA BTW FS 349 TO FS 364 AND STRG 25LH TO STGR 27 AT AVIONICS COMPARTMENT DOOR SURROUND STRUCTURE. CORROSION ON FITTING 1EA BTW FS 349 TO FS 364 AND STRG 26LH AT AVIONICS COMPARTMENT DOOR SURROUND STRUCTURE WAS REMOVED PER CRJ 900 SRM 51-21-06-001-001-A01 AND EVALUATED WHITHIN LIMITS PER CRJ 900 SRM 53-00-00-101-001, FITTING 1EA BTW FS 349 TO FS 364 AND STRG 27 AT AVIONICS COMPARTMENT DOOR SURROUND STRUCTURE WAS EVALUATED OUT OF LIMITS PER CRJ-900 SRM 53-21-23-101-003-A02 AND REPLACED PER CRJ-900 SRM 51-42-06-001-001-A01 AND SRM 51-42-21-001-001-A01.
Part: CHANNEL — CORRODED (ZONE 100) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON CHANNEL OF TCAS ANTENNA BTW FS295.0 TO FS310.0 BTW S-26L TO S-26R AT MAIN AVIONCS COMPARTMENT. CHANNEL OF TCAS ANTENNA BTW FS295.0 TO FS310.0 BTW S-26L TO S-26R AT MAIN AVIONCS COMPARTMENT WAS REPLACED PER CRJ-900 SRM 51-42-06-001-001-A01"
Part: CHANNEL — CORRODED (ZONE 100) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON SUPPORT ANGLE, FS280.0 BTW LBL11 TO RBL 11 AT COCKPIT FLOOR STRUCTURE. CORROSION ON SUPPORT ANGLE, FS280.0 BTW LBL11 TO RBL 11 AT COCKPIT FLOOR STRUCTURE WAS EVALUATED OUT OF LIMITS PER CRJ-900 SRM 51-10-06-001-001-A01, REPLACED PER CRJ900 SRM 51-42-06-001-001-A01 AND PER CRJ900 SRM 51-42-21-001-001-A01.
Part: DRIP TRAY — CORRODED (ZONE 100) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON DRIP TRAY AT FS 280.00 LBL 12 APPROX AT PASSENGER COMPARMENT. DUE TO EXCESIVE DAMAGE ON DRIP TRAY AT FS 280.00 LBL 12 APPROX AT PASSENGER COMPARMENT WAS EVA LUATED OUT OF LIMITS PER CRJ 900 SRM 53-00-00-101-001-A01, REPLACED PER CRJ-900 SRM 51-42-10-001-001-A01 AND CRJ-900 SRM 51-42-13-001-001-A01.
Part: WEB — CORRODED (ZONE 100) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON WEB LBL 12 OF THE BULKHEAD FS280.0 AT PASSENGER COMPARTMENT. DUE EXCESSIVE CORROSION ON WEB LBL 12 OF THE BULKHEAD FS280.0 AT PASSENGER COMPARTMENT WAS REPAIRED PER CRJ 900 SRM 53-11-10-201-004-A01.
Part: SEAT TRACK — CORRODED (ZONE 200) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
"DISCREPANCY: CORROSION ON RH SIDE SEAT RAILS (STGR 15R) AS FOLLOW; (6E/A) FROM FS379 TO FS720, (1E/A) FROM FS744 TO FS761 AND (1E/A) FROM FS785 TO FS847+5 AT PAX CABIN. CORRECTIVE ACTION: SUMMARY:DUE TO EXCESSIVE DAMAGE ON RH SIDE SEAT RAILS (STGR 15R) AS FOLLOW; (6E/A) FROM FS379 TO FS720, (1E/A) FROM FS744 TO FS761 AND (1E/A) FROM FS785 TO FS847+5 WERE REPLACED PER CRJ-900 SRM 51-10-06-001-001-A01 AND CRJ-900 AMM 53-00-49."
Part: SEAT TRACK — CORRODED (ZONE 200) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON LH SIDE SEAT RAILS (STGR 15L) AS FOLLOW; (6E/A) FROM FS379 TO FS720, (1E/A) FROM FS744 TO FS761, (1E/A) FROM FS785 TO FS847+5 AND (1E/A) FROM FS847+20 TO FS900 AT PAX CABIN. CORRECTIVE ACTION: SUMMARY: DUE TO EXCESSIVE DAMAGE ON LH SIDE SEAT RAILS (STGR 15L) AS FOLLOW; (6E/A) FROM FS379 TO FS720, (1E/A) FROM FS744 TO FS761, (1E/A) FROM FS785 TO FS847+5 AND (1E/A) FROM FS847+20 TO FS900 AT PAX CABIN. WERE REPLACED PER CRJ-900 SRM 51-10-06-001-001-A01 AND CRJ-900 AMM 53-00-49.
Part: SEAT TRACK — CORRODED (ZONE 200) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON INBD RH FLOOR SEAT RAILS RBL9 AS FOLLOW; (4E/A) FROM FS379 TO FS677 AND (2E/A) FROM FS677 TO FS954 AT PAX CABIN. DUE TO EXCESSIVE DAMAGE ON INBD RH FLOOR SEAT RAILS RBL9 AS FOLLOW; (4E/A) FROM FS379 TO FS677 AND (2E/A) FROM FS677 TO FS954 AT PAX CABIN, WERE REPLACED PER CRJ 900 SRM 53-21-49-101-001-A01, SRM 53-31-49-101-001-A02, SRM 53-41-49-101-001-A02, SRM 53-51-49-101-001-A02 AND AMM 53-00-49.
Part: SEAT TRACK — CORRODED (ZONE 200) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON LH FLOOR SEAT RAILS LBL9 AS FOLLOW; (4E/A) FROM FS349 TO FS677 AND (2E/A) FROM FS677 TO FS954 AT PAX CABIN. DUE TO EXCESSIVE DAMAGE ON LH FLOOR SEAT RAILS LBL9 AS FOLLOW; (4E/A) FROM FS349 TO FS677 AND (2E/A) FROM FS677 TO FS954 AT PAX CABIN. WERE REPLACED PER CRJ-900 SRM 51-10-06-001-001-A01 AND CRJ/900 AMM 53-00-49.
Part: HINGE FITTING — WORN (ZONE 300) · airframe 13,250 hrs · 13,743 cycles
FREE PLAY ON SELF-ALIGN SELF-LUB BEARING PLAIN ON HINGE FITTING NR 2 AND NR 3 AT VERTICAL STABILIZER REAR SPAR MIDDLE SECTION. HINGE FITTING NR 2 AND NR 3 AT VERTICAL STABILIZER REAR SPAR MIDDLE SECTION WERE REPLACED IAW SRM 51-42-21-001-001-A01 AND RIL 2103 REV. B.
Part: BONDING JUMPER — CORRODED (ZONE 500) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON AILERON HINGE FITTING ASSEMBLIES ON SETTLEMENTE AREA OF BODING JUMPERS (4E/A) ON LH WING AND (4E/A) ON RH WING ALSO CORROSION ON HARDWARE TO ATTACH THE SAME BONDING JUMPERS. BONDING JUMPERS P/N MS25083-2BB8 (4E/A) ON RH WING AND BONDING JUMPERS P/N MS25083-2BB8 (4E/A) ON LH WING WERE REPLACED PER CRJ 900 AMM 27-15-01"
Part: RETAINER — CORRODED (ZONE 500) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION AT LT & RT P-SEAL GANG CHANNELS AND ATTACHED RETAINERS WS10-WS14.5 (NUT CHANNEL, 2 EAS, ONE PER SIDE. LT & RT P-SEAL GANG CHANNELS AND ATTACHED RETAINERS WS10-WS14.5 WERE REPLACED PER CRJ-900 SRM51-41-02-001-001-A01"
Part: RETAINER — CORRODED (ZONE 500) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION AT LH & RH P-SEAL GANG CHANNELS AND ATTACHED RETAINERS WS10-WS14.5 (NUT CHANNEL, 2 EAS, ONE PER SIDE. LT & RT P-SEAL GANG CHANNELS AND ATTACHED RETAINERS WS10-WS14.5 WERE REPLACED PER CRJ-900 SRM51-41-02-001-001-A01.
Part: ACCESS PANEL — CORRODED (ZONE 100) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON ACCESS PANELS 542AZ, 622EZ AND 599AB. ACCESS PANEL 542AZ WAS REMOVED PER CRJ 900 SRM 51-21-06-001-001-A01 AND WITHIN LIMITS PER CRJ-900 SRM 53-00-00-101-001-A01. W ACCESS PANEL 599BB WAS VERIFIED ( P/N: 601R13442-7) PER CRJ-900 AIPC 27-15-01. ACCESS PANEL 642AZ WAS VERIFIED ( P/N: CC670-10334-4) PER CRJ-900 AIPC 57-52-32.
Part: BEAM — CORRODED (ZONE 100) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON BEAM SIDE, RIGHT SIDE FROM FS985.00 TO FS1088.20 WL 72.00 AND LEFT SIDE FROM FS1049.00 TO FS1053.00 WL 72.00 AT AFT BAGGAGE-BAY. CORROSION ON BEAM SIDE, RIGHT SIDE FROM FS985.00 TO FS 1015.00 AND FS1069.75 TO FS1088.20 WL 72.00 AND LEFT SIDE FROM FS1049.00 TO FS1053.00 WL 72.00 AT AFT BAGGAGE-BAY WAS REMOVED AND EVALUATED WITHIN OF LIMITS PER CRJ-900 SRM 51-21-06-001-001-A01 AND SRM 53-00-45-201-001-A01. BEAMS RIGHT SIDE FROM FS1015.00 TO FS1069.75 WERE REPLACED PER CRJ-900 SRM 51-42-06-001-001-A.
Part: STRAP — CORRODED (ZONE 100) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION AT SUPPORT STRUCTURE STRAP BTW FAIRING ACCESS PANEL 193AL & 193AR TO FAIRING ACCESS PANEL 193AB. DUE TO EXCESESIVE CORROSION AT SUPPORT STRUCTURE STRAP BTW FAIRING ACCESS PANEL 193AL & 193AR TO FAIRING ACCESS PANEL 193AB WERE REPLACED PER CRJ900 SRM 51-42-06-001-001-A01.
Part: FITTING — CORRODED (ZONE 800) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON FITTINGS (2 EAS) BTW FS310.00 TO FS349.00 WL 72.00 ENTRY PASSENGER DOOR AT PAX CABIN. FITTINGS (2 EAS) BTW FS310.00 TO FS349.00 WL 72.00 ENTRY PASSENGER DOOR AT PAX CABIN WERE EVALUATED OUT OF LIMITS PER CRJ-900 SRM 51-10-06-001-001-A01, REPLACED PER CRJ 900 SRM 51-42-06-001-001-A01 AND CRJ-900 SRM 51-42-21-001-001-A01."
Part: RETAINER — CORRODED (ZONE 500) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON SEAL RETAINERS OF HINGE FAIRINGS NBR 597AB, 595AB, 586AB, 592AB, 583AB, 695AB, 686AB, 683AB & 683BB OF RH/LH WINGS CORROSION ON SEAL RETAINERS OF FAIRINGS 595AB(2EAS), 586AB(2EAS), 592AB(3EAS), 583AB(4EAS) 695AB(2AES), 686AB(2EAS), 683AB(2EAS) WAS REMOVED PER CRJ-900 SRM 51-21-06-001-001-A01 AND EVALUATED WITHIN LIMITS PER CRJ-900 SRM 57-52-01-101-001-A01. SEAL RETAINERS OF FAIRINGS 597AB 683AB (2 EAS), (2EAS), 683AB(2AES) AND 683BB(2EAS) WERE REPLACED PER CRJ-900 SRM 51-42-10-001-001-A01."
Part: ANGLE — CORRODED (ZONE 100) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON ANGLES (2 EAS, ONE PER SIDE) BEHIND ACCESS PANELS; 542AZ AND 642AZ AT LH/RH MLG AREA. ANGLES (2 EAS, ONE PER SIDE) BEHIND ACCESS PANELS; 542AZ AND 642AZ AT LH/RH MLG AREA WERE REPLACED PER CRJ-900 SRM 51-42-21-001-001-A01"
Part: CLAMP — CORRODED (ZONE 700) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON SUPPORTS CLAMPS (4 EAS, TWO PER SIDE) BEHIND ACCESS PANELS; 542AZ AND 642AZ AT LH/RH MLG AREA. SUPPORTS CLAMPS (4 EAS, TWO PER SIDE) BEHIND ACCESS PANELS; 542AZ AND 642AZ AT LH/RH MLG AREA WERE REPLACED REPLACED PER CRJ-900 SRM 51-10-06-001-001-A01 AND SRM 51-42-06-001-001-A01.
Part: CROSSBEAM — CORRODED (ZONE 200) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
IN REFERENECE TO NRC 00129: AFTER REMOVAL OF ANGLE CAP, CORROSION ON LH CROSSBEAM AT FS280 WAS FOUND. LT CROSSBEAM AT FS280 WAS EVALUATED OUT OF LIMITS PER CRJ900 SRM 53-00-00-101-001-A01 AND REPLACED PER CRJ 900 SRM 51-42-21-001-001-A01, SRM 51-42-06-001-001-A01 AND SRM 51-42-10-001-001-A01."
Part: WEB — CRACKED (ZONE 200) · airframe 13,250 hrs · 13,743 cycles
CRACK ON FLOOR WEB RH SIDE (BELOW ADG SUPPORT DOUBLER) FS 193 AT FWD EQUIPMENT COMPARTMENT. FLOOR WEB RH SIDE (BELOW ADG SUPPORT DOUBLER) FS 193 AT FWD EQUIPMENT COMPARTMENT WAS REPAIRED PER CRJ-900 SRM 53-11-43-201-001-A01.
Part: FLOORBEAM — CRACKED (ZONE 100) · airframe 13,250 hrs · 13,743 cycles
CRACKED CENTER COCKPIT FLOOR BEAM RBL 12 AT FS280.0 FLOOR INTERNAL SUPPORT STRUCTURE BELOW FLIGHT COMPARTMENT CENTER COCKPIT FLOOR BEAM RBL 12 AT FS280.0 FLOOR INTERNAL SUPPORT STRUCTURE BELOW FLIGHT COMPARTMENT WAS REPAIRED PER REO 690-53-11-2095 REV. -."
Part: FLOORBEAM — CRACKED (ZONE 200) · airframe 13,250 hrs · 13,743 cycles
CRACK ON FLOOR BEAM RBL 12.0 BTW FS 221.73 TO FS 229.00 AT FWD FUSELAGE INTERNAL STRUCTURE ( FLIGHT COMPARTMENT FLOOR STRUCTURE BELOW WATER LINE 79.50). FLOOR BEAM RBL 12.0 BTW FS 221.73 TO FS 229.00 AT FWD FUSELAGE INTERNAL STRUCTURE ( FLIGHT COMPARTMENT FLOOR STRUCTURE BELOW WATER LINE 79.50) WAS REPAIRED PER REO 690-53-11-2099 REV --"
Part: SKIN — DENTED (ZONE 600) · airframe 13,250 hrs · 13,743 cycles
DENT ON INTERNAL SKIN OF INBD FLAP LOWER SIDE FLS120.00 APPROX AT RH WING. DENT ON INTERNAL SKIN OF INBD FLAP LOWER SIDE FLS120.00 APPROX AT RH WING WAS REPAIRED PER CRJ-900 SRM 57-52-01-201-001-A01."
Part: SUPPORT — CORRODED (ZONE 200) · corrosion level 2 · airframe 13,250 hrs · 13,743 cycles
CORROSION ON SUPPORTS ON CROSS BEAM ON FS: 208.00 (1 EA) AND FS: 310.00 (2 EAS) , ALSO FS: 315.00 (1 EA) RBL 5, FS: 349.00 LBL 19 APPROX. CORROSION ON SUPPORTS ON CROSS BEAM ON FS: 208.00 (1 EA) AND FS: 310.00 (2 EAS) , ALSO FS: 315.00 (1 EA) RBL 5, FS: 349.00 LBL 19 APPROX. WAS REMOVED PER CRJ 900 SRM 51-21-06-001-001-A01, FLOOR SUPPORTS AT STA 280 AND STA 310 LBL 22 WERE EVALUATED OUT OF LIMITS PER SRM 51-10-06-001-001-A01 AND REPLACED PER CRJ-900 SRM 51-42-21-001-001, SUPPORTS ON CROSS BEAM ON FS: 310.00, SUPPORT FS: 315.00 AND FS: 349.00 LBL 19 WERE EVALUATED WITHIN LIMITS PER CRJ-900 SRM 53-00-00-101-001-A01."
Part: COWLING — DAMAGED (ZONE 400) · airframe 13,250 hrs · 13,743 cycles
TEMPORARY REPAIR TO THE LH LOWER FORWARD CORE COWL INBOARD LOWER Z-DISHING AND FIRE SHIELD THE FOLLOWING TEMPORARY REPAIR IS VALID FOR A MAXIMUM OF 8000 FLIGHT HOURS FROM THE TIME OF INCORPORATION OF THIS REO AT REV -. LEFT LOWER FORWARD CORE COWL INBD LOWER Z-DISHING AND FIRE SHIELD WAS REPAIRED PER REO 690-54-23-286 REV. B"