NORTHERN AIR CARGO LLC

Operated by NORTHERN AIR CARGO INC (per NTSB report)

CABIN ALT WARNING IN CRUISE. UNCONTROLLABLE IN AUTO OR STANDBY. WAS CONTROLLABLE IN MANUAL MODE. CR FLT 320 FOR ABOUT 30 MINS. REMOVED AND REPLACED CABIN PRESS OUTFLOW VALVE, OPS CHECK GOOD REF B737-400 AMM 21-31-11

AIRCRAFT SKIN DAMAGE UNDER CARGO DOOR DURING LOADING. STRINGER DAMAGED AT STR 17L, BS 445. REPAIRED DAMAGE BY INSTALLING DOUBLER REF AWATS EO 26-737-53-386 CLASSIFICATION MAJOR REPAIR.

L1 DOOR SLIDE DEPLOYED (INADVERTENT, HUMAN ERROR). REMOVED AND REPLACED L1 DOOR SLIDE ASSY REF AMM 25-61-35-402-003

NUMBER 4 BRAKE COOL TO THE TOUCH, REQUIRES EXCESSIVE PRESSURE TO STOP. BLED NR 4 BRAKE IAW AMM 32-41-00, OPS & LEAK CHECKED GOOD.

AFTER LANDING IN PANC WITH AUTOBRAKE AT 3, NR 1 BRAKE COOL TO TOUCH. RESET NR 1 BRAKE HYDRAULIC FUSE & BLED NR 1 MLG BRAKE SYSTEM IAW AMM 32-41-00. GROUND TESTED NORMAL

EXCESSIVE BRAKE PRESSURE NEEDED TO SLOW ACFT, LT BRAKE APPEARS COOL TO THE TOUCH. BRAKE FUSE FAILED TEST IAW AMM 32-41-00-870-802. R & R NR 1 BRAKE FUSE IAW AMM 32-41-72, LEAK & OPS CHKD GOOD.

AFTER A HIGH SPEED TAXI RUN AND MAX MANUAL BRAKES, THE NR 4 BRAKE IS COLD WHILE ALL OTHER BRAKES ARE VERY HOT. PERFORMED FUNCTIONAL TEST OF NR 4 BRAKE FUSE, OPS CHECK FAILED. IAW AMM TASK 32-41-00-870-804, REPLACED NR 4 BRAKE FUSE, OPS CHECKED GOOD.

EXCESSIVE BRAKES NEEDED TO STOP AIRPLANE, UPON WALK AROUND FOUND RIGHT OUTBOARD MAIN BRAKE TO BE COLD TO THE TOUCH. PERFORMED MANUAL SYS B HYD BRAKE FUSE TEST, ALL 4 BRAKES FROM TEST PASS, REF AMM 32-41-00-870-804. BLED BRAKES, OPS CHECK GOOD REF AMM 32-41-00

EXCESSIVE BRAKE PRESSURE NEEDED TO SLOW AIRCRAFT. MX FOUND INBOARD BRAKES HOT, OUTBOARD BRAKES COLD AND OUTBOARD BRAKES WOULD NOT FUNCTION WHEN PUMPED. RESET ALL FOUR BRAKE FUSES AND 2 ALTERNATE FUSES, ALL BRAKES OPS CHECKED GOOD REF B737-800 32-41-00-870-802

NUMBER 2 ENGINE BLEED LIGHT ILLUMINATED DURING ENGINE RUN WITH HSPOV MESSAGE DISPLAYED ON ICAS. REMOVED AND REPLACED NR 2 ENG HPC IAW AMM 36-11-18-04-005-008 AND 36-11-08-04-0050-008 OPS CHECK GOOD.

NUMBER 1 ENGINE FUEL FILTER DIFFERENTIAL PRESSURE SWITCH LEAKING. REMOVED AND REPLACED FUEL FILTER DIFFERENTIAL PRESSURE SWITCH IAW AMM 73-34-01-004-001 AND AMM 73-34-01-404-016 NO LEAK NOTED.

TROUBLESHOOT RT ENGINE HPSOV INDICATION FOUND DURING IDLE. PERFORMED EICAS MAINT MASSAGE ERASE PROCEDURE IAW AMM 31-41-00-912-009. SYSTEM OK.

TROUBLESHOOT RT ENGINE PRV INDICATION FOUND DURING IDLE. PERFORMED EICAS MAINT MESSAGE ERASE PROCEDURE IAW AMM 31-41-00-912-009, SYSTEM OK

NR 2 ENGINE, SIX FAN BLADES WERE DAMAGED DURING INSTALLATION OF INLET COWL AT 12 O'CLOCK POSITION. THE ENGINE WAS R & R FOR REPAIR. RECEIVED SERVICEABLE ENGINE. ENGINE WILL BE REINSTALLED ON W/O 4677 NR 21605

APU FUEL SHUT OFF VALVE FAILED AN OPS CHECK. APU FIRE SWITCH CHECK, DOES NOT CLOSE OR OPEN ELECTRICALLY. R & R THE APU SHUT OFF VALVE ACTUATOR IAW AMM 28-25-00-004-032, & AMM 28-25-02-404-008 STEPS 3.G. (3) - 3.G (8). PERFORMED APU FUEL FEED SYS TEST. TESTED GOOD IAW AMM 28-25-00-715-264.

NUMBER 2 ENG. SIX FAN BLADES WERE DAMAGED DURING INSTALLATION OF INLET COWL AT 12 O'CLOCK POSITION. ENGINE R & R FOR REPAIR. RECEIVED SERVICEABLE ENGINE. ENGINE WILL BE REINSTALLED ON W/O 4677 NR 21605

RIGHT COOLING HEAT EXCHANGER PLENUM BOOT IS DAMAGED. REMOVED AND REPLACED RT COOLING HEAT EXCHANGER BOOT IAW AMM 21-51-02-004-001, & AMM 21-51-02-404-019. OPS CHKD GOOD.

APU ECU SELF TEST SHOWS FAULT - IGV ACT. PERFORMED APU ECU BITE TEST IAW AMM 49-61-05-742-045. NO FAULTS FOUND. BITE TEST PASSED. FOUND APU SHUTOFF VALVE STUCK IN CLOSED POSITION. RELEASED THE VALVE, SYSTEM CHECKED OK IAW AMM 49-11-00-802-002.

LEFT ENGINE FUEL SHUT OFF SPAR VALVE STUCK DURING OPS CHECK.. R & R SHUTOFF VALVE ACTUATOR IAW AMM 28-22-11-404-008, STEP 3 G.14. NO DEFECTS NOTED ON OPS CK.

LEFT COOLING PACK PLENUM BOOT IS DAMAGED. REMOVED AND REPLACED THE LT COOLING PACK PLENUM BOOT IAW AMM 21-51-07-004-001, AND 21-51-07-404-09. LEAK CHKD GOOD.

LEFT AFT FUSELAGE APPROX STA 927 TO 947 STRINGER 22 TO 25 L DAMAGED BY WIND BLOWN GSE. ACCOMPLISHED IAW AWATS EO 25-737-53-01 NAC EO 737 53-0438

NR 2 ENG PRE COOLER WAS DAMAGED. R & R NR 2 ENG PRE COOLER IAW AMM 36-11-15-004-003-001, AMM 36-11-15-404-080-005.

NUMBER 1 ENG. FAN BLADE NR 27 HAS A DING APPROX. 1.75" ON L/E FROM BLADE TIP. EVALUATED DENT AT NR 1 ENG FAN BLADE NR 27 1.75" ON L/E FROM BLADE TIP FOUND TO BE IN LIMITS IAW AMM 72-31-02. PERFORMED HFEC, NO CRACKS FOUND IAW AMM 72-31-02-206-100-N00.

NUMBER 1 ENG. FAN BLADE NR 12 HAS A DING APPROX. 1" ON L/E FROM BLADE TIP. THIS AREA WAS PREVIOUSLY BLENDED. REPAIRED DING AT NR 1 ENG FAN BLADE NR 12 1" ON L/E FROM BADE TIP AREA -A- IAW AMM 72-31-02-308-003-N00. PERFORMED HFEC, NO FOUND CRACKS AT THE AREA REWORK IAW AMM 72-31-02-206-100-N00,

NUMBER 1 ENG. FAN BLADE NR 12 HAS A DING APPROX. 1" ON L/E FROM BLADE TIP. THIS AREA WAS PREVIOUSLY BLENDED. REPAIRED DING AT NR 1 ENG FAN BLADE NR 12 1" ON L/E FROM BADE TIP AREA -A- IAW AMM 72-31-02-308-003-N00. PERFORMED HFEC, NO FOUND CRACKS AT THE AREA REWORK IAW AMM 72-31-02-206-100-N00,

NUMBER 1 ENG. FAN CASE HAS A GOUGE ON THE V-GROOVE AT 3 O'CLOCK POSITION. REMOVED DAMAGE ON NR 1 ENG FAN CASE V-GROOVE AT 3 O'CLOCK POSITION WAS FOUND WITHIN LIMITS IAW AMM 72-34-07 STEP 2. E, TABLE 801. REMOVED 0.090 DEPTH, MAXIMUM ALLOWED 0.125".

NR 1 ENG. FAN CASE HAS GOUGES ON THE V-GROOVE FROM 8 O'CLOCK TO 9 O'CLOCK POSITION. REMOVED DAMAGED ON NR 1 ENG FAN CASE V-GROOVE FROM 8 O'CLOCK TO 9 O'CLOCK POSITION WAS FOUND WITHIN LIMITS IAW AMM 72-34-07, STEP 2.E, TABLE 801. REMOVED .030" DEPTH, MAXIMUM ALLOWED 0.125".

NUMBER 2 ENG FAN BLADE AT L/E TO FAN BLADE TIP HAS A NICK AND TIP IS SLIGHTLY BENT OUT. REPAIRED THE NICK AT NR 2 ENG FAN BLADE L/E CORNER IAW AMM 72-31-02-208-003-N00. PERFORMED HFEC NO CRACKS FOUND IAW AMM 72-31-02-206-100-N00. BLADE NR 14.

NUMBER 2 ENG FAN BLADE HAS A NICK APPROX 2.5" ON L/E FROM FAN BLADE TIP. REPAIRED THE NICK AT NR 2 ENG FAN BLADE 2.5" ON L/E FROM FAN BLADE TIP IAW 72-31-02-308003-N00. PERFORMED HFEC, NO CRACKS FOUND IAW AMM 72-31-02-206-100-N00. BLADE NR 3.

NUMBER 2 ENGINE FAN BLADE HAS A DING APPROX .5" ON L/E FROM FAN BLADE TIP. REPAIRED THE DING AT NR 2 ENG FAN BLADE 5" ON L/E FROM FAN BLADE TIP IAW AMM 72-31-02-308-003-N00. PERFORMED HFEC, NO FOUND CRACKS IAW AMM 72-31-02-206-100-N00. BLADE NR 2.

NUMBER 2 ENGINE FAN BLADE HAS 2 DINGS APPROX 3.5" APART FROM EACH OTHER 1ST DING APPROX 2.5" FROM FAN BLADE TIP ON L/E OF FAN BLADE. REPAIRED THE 2 DINGS AT NR 2 ENG FAN BLADE 2.5" AND 6" FROM FAN BLADE TIP IAW AMM 72-31-02-308-N00. PERFORMED HFEC, NO CRACKS FOUND IAW AMM 72-31-02-206-100-N00. BLADE NR 31.

NUMBER 2 ENG FAN BLADE HAS A NICK WITH A BURR ON L/E AT FAN BLADE TIP. REPAIRED NICK AT NR 2 ENG FAN BLADE ON L/E IAW AMM 72-31-02-308-003-N00. PERFORMED HFEC, NO CRACKS IAW AMM 72-31-02-206-100-N00. BLADE NR 23.

NUMBER 1 ENG FAN BLADE NR 37 HAS A DING APPROX. 1.75" ON L/E FROM BLADE TIP. REPAIRED DING AT NR 1 ENG, FAN BLADE NR 37 1.75" ON L/E FROM BLADE TIP IAW AMM 72-31-02-308-003-N00. PERFORMED HFEC, NO FOUND CRACKS IAW AMM 72-31-02-206-100-N00.

ONE EA FAN EXIT VANE OF THE NR 2 ENGINE HAS A BROKEN PLATFORM AT THE INNER BASE OF PART. PERFORMED EVALUATION IF 1 EACH FAN EXIT VALVE OF #2 ENG BROKEN PLATFORM NO ADITIONAL DEFECTS NOTED. REPAIRED FAN EXIT VALVE IAW 72-33-02-308-003-N00 .

IP VALVE ON #1 ENGINE HAS SIGNS OF CRACKING AND CORROSION ON FUSELAGE. INSTALLED SERVICEABLE IP VALVE ON # 1 ENG IAW AMM 36-11-06-404-033-002. NO LEAK NOTED.

LEFT ENGINE FAILED AUTOMATIC FIRE / OVERHEAT LOGIC /TEST SYSTEM (AFOLTS) SYSTEM CHECK. CARDS WERE REPLACED WITH PN S332T301-181 SN 940, 699, 8823 AND 6780

NR 2 ENG LOWER IGNITION EXCITER CABLE BUSHING UNDER CERAMIC SLEEVE CRACKED. DOT 048200. REMOVED AND REPLACED NR 2 ENG LOWER IGNITION EXCITER CABLE IAW B767 AMM 74-21-01-004-001-N00. TEST OK. PO # GYR10300795. TW ID T100360-1 D/D 8/12/26. MECH: ALD025 10/06/2025 INSP: AQC029 10/06/2025 PC035 10/06/2025

NR 2 ENG LOWER IGNITER PLUG WORN BEYOND LIMITS. REMOVED AND REPLACED NR 2 LOWER IGNITER PLUG IAW AMM 74-21-02-004-001-N00 AND AMM 74-21-01-404-014-N00. OPS CHECK GOOD.

NR 2 ENGINE UPPER IGNITER PLUG WORN BEYOND LIMITS. REMOVED AND REPLACED NR 2 UPPER IGNITER PLUG IAW AMM 74-21-02-004-001-N00 AND AMM 74-21-01-404-014-N00. OPS CHECK GOOD.

STATIC PRESSURE SENSE LINE TUBE CHAFED ON #2 ENG. INBD FAN COWL. REMOVED AND REPLACED STATIC PRESSURE SENSE LINE TUBE ON #2 ENG INBD FAN COWL. LEAK TEST AND STATIC TEST GOOD IAW B767 AMM 71-00-02-844-002-N00 STEP 2 AMM 71-00-02-844-077-N00 STEP 7 AMM 71-00-00-795-014-N00 AND AMM 71-00-00-745-002-N00

NR 1 FAN EXIT CASE BLEED AIR DUCT, BLEED SCREENS 8 EA FROM UPPER DUCTS ARE BROKEN / MISSING. REMOVE AND REPLACE 6 EA SCREENS ON #1 ENG ESN 724378 IAW AMM 72-00-00-416-342-N00 REMAINING 2 EA UPPER SCREENS FOUND TO BE IN SERVICEABLE CONDITION IAW AMM TASK 75-32-206-001-N00 TABLE 603

BROKEN CLAMP ON OIL TUBE FWD OF OIL TANK ON #1 ENGINE. INSTALLED NEW CLAMP ON FIRE EXT. TUBE FWD OF OIL TANK ON #1 ENGINE PER AMM 20-11-00 TABLE 213/20-11-00-993-830

BUSS POWER CONTROL UNIT HAS A FAULT MESSAGE IDG / OIL OUT. PERFORMED BPCU BITE PROCEDURE PER B-767 FIM 24-30 FAULT TREE 801. BITE PROCEDURE OK.

6 TO 7 O'CLOCK (LOOKING FWD) FAN EXIT LINER NOT PROPERLY FAIRED ON #2 ENGINE. REPAIRED FAIRED FAN EXIT LINER ON #2 ENGINE AT 6 TO 7 O'CLOCK POSITION, REPLACED BROKEN SUPPORT BRACKETS FOR LINER REF MAN-PW4ENG-109 PG 18 AND SRM 51-40-02 STEP 4 (B).

10 O'CLOCK (FWD LOOKING) FAN EXIT STRUT LOWER SURFACE MISSING SEALANT ON NR 2 ENGINE. APPLIED SEALANT ON FAN EXIT STRUT LOWER SURFACE #2 ENG AT 10 O'CLOCK PER B767 AMM 73-3405 TASK 72-34-05-404-005-N00 PAR D (3) (E).

NR 1 ENG. SYS. 1 TOP IGNITION EXCITER PLUG IS WORN BEYOND LIMITS. IGNITER PLUG REPLACED IAW AMM 74-21-02-404-014-N00.

NR 1 ENG TOP IGNITION EXCITER INSIDE OUTPUT RECEPTACLE WELL HAS DAMAGE / SIGNS OF ARCING ON THE CONTACT BUTTON. REMOVED AND REPLACED #1 ENG TOP IGNITION EXCITER IAW B767 AMM 74-11-01-004-001-N00 AND AMM 74-11-01-404-019 STEP 3.

NR 2 ENGINE SEAL ATTACHED TO OIL DRAIN COLLECTOR IS DAMAGED & DETERIORATING. REMOVED & REPLACED NR 2 ENG SEAL ATTACHED TO OIL DRAIN COLLECTOR IAW AMM 51-31-01-302-001 AND 51-31-01-392-013.

NR 2 ENGINE IDG WIRING HARNESS CLAMPS NOT PROPERLY INSTALLED PERFORMED PROPERLY INSTALLATION OF THE CLAMPS IN THE IDG WIRE HARNESS AT #2 ENGINE IAW SWPM 20-10-12 STEP Y PG 148.

DURING THE ACCOMPLISHMENT OF EO737-53-0388_P1 WAS FOUND IN THE LOWER FUSELAGE RH STA 727 FRAME INNER CHORD AND S-18A WEB AT LOWER OPEN FASTENERS HOLE WITH CRACK INDICATION. DUE TO IT, THE PART WAS REPLACED IAW NAC ENGINEERING ORDER #737-53-0403 REV. IR. UNDERJOB A1Q187 NRI 1-76