# Service difficulty reports: N77539 A list on [N77539](https://openairdocs.org/aircraft/N77539.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. - [SDR CALA2026081418615](https://openairdocs.org/sdr/CALA2026081418615.md): Battery Pack · faulted · Aug 13, 2026 · N77539 · Boeing 737824 · Emergency Lighting > EMERGENCY LIGHT BATTERY PACK M1676 HAS LOW VOLTAGE. REMOVED AND REPLACED EMERGENCY LIGHT BATTERY PACK M1676. OPS CHKD GOOD IAW AMM 33-51-06-960-805. - [SDR CALA2026081418613](https://openairdocs.org/sdr/CALA2026081418613.md): Battery Pack · faulted · Aug 13, 2026 · N77539 · Boeing 737824 · Emergency Lighting > EMERGENCY LIGHT BATTERY PACK M1670 HAS LOW VOLTAGE. REMOVED AND REPLACED EMERGENCY LIGHT BATTERY PACK M1670. OPS CHKD IAW AMM 33-51-06-960-805. - [SDR CALA2026081418611](https://openairdocs.org/sdr/CALA2026081418611.md): Battery Pack · faulted · Aug 13, 2026 · N77539 · Boeing 737824 · Emergency Lighting > EMERGENCY LIGHT BATTERY PACK M1695 HAS LOW VOLTAGE. REMOVED AND REPLACED EMERGENCY LIGHT BATTERY PACK M1695 AND OPS CHKD GOOD IAW AMM 33-51-06-960-805. - [SDR CALA2026081418609](https://openairdocs.org/sdr/CALA2026081418609.md): Battery Pack · faulted · Aug 13, 2026 · N77539 · Boeing 737824 · Emergency Lighting > EMERGENCY LIGHT BATTERY PACK M2335 HAS LOW VOLTAGE. REMOVED AND REPLACED EMERGENCY LIGHT BATTERY PACK M2335 AND OPS CHKD GOOD IAW AMM 33-51-06-960-805. - [SDR CALA2026081418607](https://openairdocs.org/sdr/CALA2026081418607.md): Battery Pack · faulted · Aug 13, 2026 · N77539 · Boeing 737824 · Emergency Lighting > EMERGENCY LIGHT BATTERY PACK M1694 HAS LOW VOLTAGE. REMOVED AND REPLACED EMERGENCY LIGHT BATTERY PACK M1694 AND OPS CHECKED GOOD IAW AMM 33-51-06-960-805. - [SDR CALA2026081418605](https://openairdocs.org/sdr/CALA2026081418605.md): Battery Pack · faulted · Aug 13, 2026 · N77539 · Boeing 737824 · Emergency Lighting > EMERGENCY LIGHT BATTERY PACK M1671 HAS LOW VOLTAGE. REMOVED AND REPLACED EMERGENCY LIGHT BATTERY PACK AND OPS CHKD GOOD IAW AMM 33-51-06-960-805. - [SDR CALA2026081118486](https://openairdocs.org/sdr/CALA2026081118486.md): Plate · corroded · Aug 7, 2026 · N77539 · Boeing 737824 · Fuselage Main, Plate/Skin > LOWER TCAS ANTENNA MOUNTING SURFACE SKIN HAD GOUGES AND CORROSION. REMOVED AND REPLACED ADAPTER PLATE IAW DWG 141A3501, REV- AND SRM 51-40-02. RESTORED PROTECTIVE TREATMENT IAW AMM 51-21-99. - [SDR CALA2026080518313](https://openairdocs.org/sdr/CALA2026080518313.md): Pressure Deck · dented · Aug 4, 2026 · N77539 · Boeing 737824 · Fuselage Main, Structure > B737-MP-2000-53-340-00: FLIGHT DECK ENTRY FLOOR HAS A DENT. REMOVED DAMAGE, HFEC HOLES AND AREA, NO DEFECTS NOTED, FABRICATED, LOCATED AND INSTALLED REPAIR, RESTORED COATINGS IAW UAL ECRA 5315-01235 REV- AND AAR GSO REO-G26011 REV IR. - [SDR CALA2026080718343](https://openairdocs.org/sdr/CALA2026080718343.md): Attach Angle · cracked · Aug 3, 2026 · N77539 · Boeing 737824 · Fuselage Main, Attach Fittings > FWD CARGO COMPARTMENT INTERCOSTAL ATTACH ANGLE IS CRACKED AT BS 500H, S26R. REMOVED CRACKED ATTACH ANGLE AND BAFFLE AND REPLACED WITH NEW IAW SRM 51-40-02, 51-40-05, & DWG 143A7505 REV-. - [SDR CALA2026081318547](https://openairdocs.org/sdr/CALA2026081318547.md): Floorbeam · corroded · Jul 28, 2026 · N77539 · Boeing 737824 · Fuselage Main, Floor Beam > CORROSION ON THE TEE FITTING, BS 947, RBL 36, FWD OF R2 DOOR. REMOVED DAMAGE, HFEC OPEN HOLES & CUT AREA,NO DEFECTS NOTED. ROTO PEENED, FABRICATED & LOCATED REPAIR PARTS, INSTALLED AND RESTORED COATINGS IAW SRM 53-70-51-2R-5, AND DWG 147A5650. THIS IS A C - [SDR CALA2026081318545](https://openairdocs.org/sdr/CALA2026081318545.md): Floorbeam · corroded · Jul 28, 2026 · N77539 · Boeing 737824 · Fuselage Main, Floor Beam > CORROSION ON THE TEE ANGLE AND FITTING AT BS 947, LBL 18. REMOVED DAMAGE, HFEC OPEN HOLES & CUT AREA, ROTO PEENED, NO DEFECTS NOTED. FABRICATED & LOCATED REPAIR PARTS, INSTALLED AND RESTORED COATINGS IAW SRM 53-70-51-2R-5 & DWG 147A5650, REV A. THIS IS A CAT - [SDR CALA2026081318543](https://openairdocs.org/sdr/CALA2026081318543.md): Floor Support · corroded · Jul 28, 2026 · N77539 · Boeing 737824 · Fuselage Miscellaneous Structure > FLOOR SUPPORT BETWEEN BS 947 & BS 967, RBL 24.75, FOUND TO BE CORRODED. REMOVED AND REPLACED THE FLOOR SUPPORT IAW SRM 51-40-02, AND DWG 147A5650, REV A. - [SDR CALA2026081318541](https://openairdocs.org/sdr/CALA2026081318541.md): Intercostal · corroded · Jul 28, 2026 · N77539 · Boeing 737824 · Fuselage Miscellaneous Structure > MAIN CABIN INTERCOSTAL AT BS 947, RBL 50, WL 208 WAS CORRODED AT HARD POINT FITTING. REMOVED AND REPLACED INTERCOSTAL IAW SRM 51-40-02 & DWG 147A5650, REV-. - [SDR CALA2026081318539](https://openairdocs.org/sdr/CALA2026081318539.md): Structure · corroded · Jul 28, 2026 · N77539 · Boeing 737824 · Fuselage Main, Structure > MAIN CABIN INNER CHORD AT R2 DOOR BS 947, RBL 55, WL 208 CORRODED. R & R INNER CHORD AT R2 DOOR IAW SRM 51-40-02, AND DWG 147A8501, REV A. NO FURTHER ACTION REQUIRED. - [SDR CALA2026081318537](https://openairdocs.org/sdr/CALA2026081318537.md): Floor Support · corroded · Jul 28, 2026 · N77539 · Boeing 737824 · Fuselage Miscellaneous Structure > MAIN CABIN INTERCOSTAL AT BS 947, LBL 25, WL 208, UNDER HARD POINT FITTING HAS SIGNS OF CORROSION. R & R INTERCOSTAL IAW SRM 51-40-02 AND DWG 147A5650, REV A. NO FURTHER ACTION REQUIRED. - [SDR CALA2026081318535](https://openairdocs.org/sdr/CALA2026081318535.md): Floor Support · corroded · Jul 28, 2026 · N77539 · Boeing 737824 · Fuselage Miscellaneous Structure > FLOOR SUPPORT BETWEEN BS 947 & 967, LBL 52.5 FOUND TO BE CORRODED. R & R FLOOR SUPPORT IAW SRM 51-40-02, & DWG 147A5650, REV A. NO FURTHER ACTION REQUIRED. WORK ACCOMPLISHED AT AAR GSO ON NON-ROUTINE 9286417. - [SDR CALA2026081318533](https://openairdocs.org/sdr/CALA2026081318533.md): Floor Support · corroded · Jul 28, 2026 · N77539 · Boeing 737824 · Fuselage Main, Floor Beam > MAIN CABIN FLOORBEAN AT LBL 51 - LBL 24, BS 947+4 FOUND TO BE CORRODED. R & R FLOORBEAM IAW SRM 51-40-02 AND DWG 147A5650, REV A. NO FURTHER ACTION REQUIRED. WORK ACCOMPLISHED AT AAR GSO ON NON-ROUTINE 9286383. R & R FLOORBEAM IAW SRM 51-40-02 AND DWG 147A - [SDR CALA2026072918080](https://openairdocs.org/sdr/CALA2026072918080.md): Channel · corroded · Jul 27, 2026 · N77539 · Boeing 737824 · Fuselage Miscellaneous Structure > RIGHT ZEE CHANNEL HAS MULTIPLE AREAS OF CORROSION. FWD CARGO. CORROSION TO SHIELD EXCESSIVE AND 100% MAT LOSS, OUT OF LIMITS IAW SRM 53-00-53. LOCATED, DRILLED AND INSTALLED NEW SHIELD IAW SRM 51-40-05, DWG 143A8126 REV-. - [SDR CALA2026072818068](https://openairdocs.org/sdr/CALA2026072818068.md): Transition Panel · punctured · Jul 26, 2026 · N77539 · Boeing 737824 · Fuselage Miscellaneous Structure > AFT CARGO COMPARTMENT STA 767+3 LBL 23.5 L/H TRANSITION PANEL IS PUNCTURED. REPAIRED TRANSITION PANEL IAW SRM 53-00-53-2R-6. - [SDR CALA2026052016415](https://openairdocs.org/sdr/CALA2026052016415.md): Battery Pack · faulted · May 20, 2026 · N77539 · Boeing 737824 · Emergency Lighting > RT INTERIOR OVERWING EXIT EMERGENCY LIGHTS INOPERATIVE, ALONG WITH MIDDLE ISLE EXIT SIGN R&R STA 565 WL 213 RBL 68 EMERGENCY EXIT LIGHT BATTERY PACK IAW AMM 33-51-06-960-805. - [SDR CALA2026051716319](https://openairdocs.org/sdr/CALA2026051716319.md): Battery Pack · inoperative · May 16, 2026 · N77539 · Boeing 737824 · Emergency Lighting > EMERGENCY ESCAPE LIGHTS FROM ROW 7ABC TO 14ABC, RH OVERWING EXTERIOR LIGHT BETWEEN THE ESCAPE HATCHES AND OVERHEAD AISLE EMERGENCY EXIT SIGN BETWEEN OVERWING ESCAPE HATCHES ARE ALL INOP. THE OVERWING EMERGENCY LIGHT BETWEEN THE TWO ESCAPE HATCHES THAT IS INOP - [SDR CALA2026041515394](https://openairdocs.org/sdr/CALA2026041515394.md): Lamp · inoperative · Apr 15, 2026 · N77539 · Boeing 737824 · Emergency Lighting > L2 EMERGENCY SLIDE LIGHT OUT REPLACED WITH NEW LAMP AND OP' CHECK OK PER AMM TASK 33-51-04-960-801 UPDATED SDR - [SDR CALA2025101309934](https://openairdocs.org/sdr/CALA2025101309934.md): Pin · unsecure · Oct 11, 2025 · N77539 · Boeing 737824 · Light System Wiring > EMERGENCY LIGHTING SYSTEM OPERATIONAL CHECK. EMERGENCY LIGHT INOP AT 23C. FOUND PIN PUSHED BACK AT SIDEWALL DISC 23C. RESECURED PIN. OPS CHECK GOOD. REF. WDM 33-51-22-12. - [SDR CALA2025090408468](https://openairdocs.org/sdr/CALA2025090408468.md): Bulb · inoperative · Aug 29, 2025 · N77539 · Boeing 737824 · Emergency Lighting > R/H AFT OVERWING EMERGENCY LIGHT INOP. SUPPORT TASK NSA EMX N/R 00266. REPLACED RH AFT OVER WING EMERGENCY LIGHT BULB AND TESTED GOOD IAW B737-800 AMM 33-51-04-960-801. DATA WAS TRANSCRIBED FROM NSA EMX N/R 00266. - [SDR CALA2025061905709](https://openairdocs.org/sdr/CALA2025061905709.md): Power Supply · discharged · Jun 15, 2025 · N77539 · Boeing 737824 · Emergency Lighting > EMERGENCY LIGHTING SYSTEM FUNCTIONAL CHECK (INTERIOR AND EXTERIOR) {MULT-33-3-0004} - M1673 FAILED FUNCTIONAL CHECK. REPLACED BATTERY PACK IN M1673 POWER SUPPLY TWICE, IAW AMM 33-51-06-960-805, UP TO AND INCLUDING STEP 4.E.(6)(B). TEST BUTTON ON POWER SUPPLY D - [SDR CALA2025061105449](https://openairdocs.org/sdr/CALA2025061105449.md): Light · abnormal · Jun 8, 2025 · N77539 · Boeing 737824 · Passenger Compartment Lighting > EMERGENCY EXIT LIGHT 20DEF FLICKERS FOUND HALF OF THE WINDOW LED LIGHT NEAR SEATS 20DEF FLICKERING RESET POWER TO LIGHT NO HELP REQUESTING MEL 3302B DEACTIVATED ADD FAULT: 3321 RIGHT SIDE WINDOW LIGHTS BY PULLING AND SAFTYING BREAKER E11 ON P92 CB PANEL IN REF - [SDR CALA2025051604722](https://openairdocs.org/sdr/CALA2025051604722.md): Slide · no discrepancy · May 15, 2025 · N77539 · Boeing 737824 · Escape Slide > 1L SLIDE PACK BORDERLINE TOO HIGH INSPECTED 1L DOOR SLIDE PRESSURE PER AMM TASK 25-66-01-200-801. PRESSURE WITHIN LIMITS. OK FOR SERVICE. - [SDR CALA2025040903659](https://openairdocs.org/sdr/CALA2025040903659.md): Battery Pack · discharged · Apr 8, 2025 · N77539 · Boeing 737824 · Emergency Lighting > RIGHT GALLEY EMERGENCY LIGHTS INOP REMOVED AND REPLACED BATTERY PACK FOR FWD RIGHT GALLEY EMERGENCY LIGHTS. OPS CKS GOOD.PARTS USED: 99-3351-3-0015, QTY:1 - [SDR CALA2024010900068](https://openairdocs.org/sdr/CALA2024010900068.md): Proximity Sensor · out of tolerance · Jan 6, 2024 · N77539 · Boeing 737824 · Trailing Edge Flap Control System > LE FLAP TRANSIT LIGHT ILLUMINATED AFTER SELECTINF FLAPS.PERFORM ED QRH PERFORMED FIM 27-88 TASK 805 STEP (4) UP TO STEP (4)(G). FOUND S168 RED TERMINAL AT D728A PIN K12 OUT OF TOLERANCE,250 OHMS TO GROUND. ADD EMP:U408540 REF WDM 27-81-11-2 FOR LEFT WING LEAD - [SDR CALA2023073102369](https://openairdocs.org/sdr/CALA2023073102369.md): Battery Pack · inoperative · Jul 28, 2023 · N77539 · Boeing 737824 · Emergency Lighting > EXIT LIGHT ABOVE L1 DOOR WILL NOT ILLUMINATE (REF. AAR NR 99978502). REPLACED BATTERY PACK M1675 WITH NEW BATTERY PACK IAW B737 AMM 33-51-06-960-805. INSTALLATION TEST GOOD. (WORK ACCOMPLISHED BY V937131 AND AAR QC A-83 V935067). - [SDR CALA2022120203271](https://openairdocs.org/sdr/CALA2022120203271.md): Slide · unwanted deploy · Dec 2, 2022 · N77539 · Boeing 737824 · Escape Slide > SLIDE NOT DISARMED ON DO OR 1L ON OPENING. REPLACED DOOR 1 LEFT ESCAPE SLIDE REF AMM 25-66-01. ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet' WHERE n_number = 'N77539' AND registry_match = 'registration' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/aircraft/N77539/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.