# Service difficulty reports: N37521

A list on [N37521](https://openairdocs.org/aircraft/N37521.md).

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first.

- [SDR CALA2026071617793](https://openairdocs.org/sdr/CALA2026071617793.md): Battery Pack · discharged · Jul 14, 2026 · N37521 · Boeing 7379 · Emergency Lighting
  > REMOVED AND REPLACED BATTERY PACKS M1672, M03378 AND M1670. FOR SCEPTRE TRACKING ONLY. REMOVED AND REPLACED BATTERY PACKS M1672, M03378 AND M1670. IAW AMM 33-51-06-960-802. EMERGENCY LIGHTS TEST GOOD FOR SERVICE. REMOVED AND REPLACED BATTERY PACKS M1672, M0
- [SDR CALA2026071417784](https://openairdocs.org/sdr/CALA2026071417784.md): Battery Pack · no test · Jul 14, 2026 · N37521 · Boeing 7379 · Emergency Lighting
  > DURING EMERGENCY LIGHT TEST, BATTERY PACK M1670 FAILED. REMOVED AND REPLACED BATTERY PACKS M1670 IAW WORK CARD3502921-0000-0037. EMERGENCY LIGHTS TEST GOOD FOR SERVICE.
- [SDR CALA2026071417782](https://openairdocs.org/sdr/CALA2026071417782.md): Battery Pack · no test · Jul 14, 2026 · N37521 · Boeing 7379 · Emergency Lighting
  > DURING EMERGENCY LIGHT TEST, BATTERY PACK M03378 FAILED. REMOVED AND REPLACED BATTERY PACKS M03378 IAW WORK CARD3502921-0000-0037. EMERGENCY LIGHTS TEST GOOD FOR SERVICE.
- [SDR CALA2026072217938](https://openairdocs.org/sdr/CALA2026072217938.md): Window Frame · corroded · Jul 13, 2026 · N37521 · Boeing 7379 · Fuselage Main, Structure
  > FLIGHT DECK L1 WINDOW FRAME, POSSIBLE CORROSION. PERFORMED A REPAIR TO THE L1 WINDOW FRAME A-B & C-D POST, A-C & B-D SILL IAW ECRA 5610-01570 REV A.
- [SDR CALA2026071417760](https://openairdocs.org/sdr/CALA2026071417760.md): Beam · cracked · Jul 13, 2026 · N37521 · Boeing 7379 · Fuselage Main, Structure
  > FWD CARGO DOOR, MACHINED BEAM #4 WITH CRACK ON UPPER CHORD AT STA 442. PERFORMED REPAIR TO FRAME P/N 143A6118-9 IAW ECRA 5230-02326,.THE REPAIR ACCOMPLISHED IN PART 1 IS A CATEGORY B REPAIR REQUIRING REPETITIVE INSPECTION REQUIRMENTS (RIR) STATED IN PART 2.
- [SDR CALA2026071417758](https://openairdocs.org/sdr/CALA2026071417758.md): Frame · cracked · Jul 13, 2026 · N37521 · Boeing 7379 · Fuselage Main, Structure
  > FWD CARGO DOOR, UPPER FORMED FRAME WITH CRACK ON UPPER CHORD AT BS 477. PERFORMED THE REPAIR TO THE UPPER FRAME IAW ECRA 5230-02326,.THE REPAIR ACCOMPLISHED IN PART 1 IS A CATEGORY B REPAIR REQUIRING REPETITIVE INSPECTION REQUIRMENTS (RIR) STATED IN PART 2.
- [SDR CALA2026071417756](https://openairdocs.org/sdr/CALA2026071417756.md): Beam · cracked · Jul 13, 2026 · N37521 · Boeing 7379 · Cargo/Baggage Doors
  > FWD CARGO DOOR, UPPER MACHINED BEAM NR 1, WITH CRACK ON UPPER SECTION AT BS 461. PERFORMED THE REPAIR TO THE BEAM IAW ECRA 5230-02326.
- [SDR CALA2026072217942](https://openairdocs.org/sdr/CALA2026072217942.md): Beam · cracked · Jul 12, 2026 · N37521 · Boeing 7379 · Fuselage Main, Structure
  > PERFORM AN INSPECTION OF THE REPAIRS ON THE FORWARD CARGO DOOR UPPER FRAME AND BEAM IAW THE PART TWO OF THE LATEST REVISION OF ECRA 5230-02326INITIATED A DIP TO INSPECT REPAIRS ON THE FORWARD CARGO DOOR UPPER FRAME AND BEAM. INTERIM REPAIR ACCOMPLISH ON THE
- [SDR CALA2026072217940](https://openairdocs.org/sdr/CALA2026072217940.md): Door Frame · cracked · Jul 12, 2026 · N37521 · Boeing 7379 · Fuselage Main, Structure
  > CONTACT ENGINEERING FOR THE INSPECTION REQUIREMENTS ON THE FORWARD CARGO DOOR UPPER FRAME AND BEAM REPAIRS IAW PART TWO OF THE LATEST REVISION OF ECRA 5230-02326INITIATED A DIP TO HAVE PLANNING CONTACT ENGINEERING FOR THE INSPECTION REQUIREMENTS ON THE FORWARD
- [SDR CALA2026071217673](https://openairdocs.org/sdr/CALA2026071217673.md): Skin · dented · Jul 6, 2026 · N37521 · Boeing 7379 · Cargo/Baggage Doors
  > (SUPPORT TASK) FOUND DENTS OUT OF LIMITS AT THE FWD CARGO DOOR EXTERNAL SKIN REQUIRE REPLACEMENT. REMOVED AND REPLACED THE FWD CARGO DOOR EXTERNAL SKIN IAW B737 SRM 52-30-01-2R-3. REMOVED AND REPLACED THE FWD CARGO DOOR EXTERNAL SKIN IAW SRM 52-30-01-2R-3.
- [SDR CALA2026062917411](https://openairdocs.org/sdr/CALA2026062917411.md): Channel · corroded · Jun 25, 2026 · N37521 · Boeing 7379 · Fuselage Miscellaneous Structure
  > FOUND DAMAGE CORROSION AT THE FWD CARGO FLOOR STRUCTURE ZEE CHANNEL LH SIDE FROM STA 500B TO STA 500L (REF AAR NR 1000080344) REMOVED AND REPLACED ZEE CHANNEL, APPLIED PRIMER AND ALODINE AT THE FWD CARGO FLOOR STRUCTURE LH SIDE FROM STA 500A TO STA 500L ALL WO
- [SDR CALA2026061717157](https://openairdocs.org/sdr/CALA2026061717157.md): Bracket · cracked · Jun 16, 2026 · N37521 · Boeing 7379 · Auxiliary Power Unit (APU) Doors
  > DAMAGED HOLD-OPEN RODS BRACKET IN THE APU DOOR AFT SIDE. R & R NEW BRACKET IN THE APU DOOR AFT SIDE, APPLIED ALODINE AND PRIMER IAW DWG 148A2694 REV- & DWG 148A2690 REV- & SRM 51-40-05-0G-0, 51-40-02-0G-0, & AMM 51-21-72-370-804, 51-21-41-370-802.
- [SDR CALA2026061217058](https://openairdocs.org/sdr/CALA2026061217058.md): Channel · corroded · Jun 11, 2026 · N37521 · Boeing 7379 · Fuselage Miscellaneous Structure
  > FOUND DAMAGE CORROSION AT THE FWD CARGO FLOOR STRUCTURE RT ZEE CHANNEL FROM STA 500A TO STA 500L. REMOVED AND REPLACED RT ZEE CHANNEL BTW BS 500A TO 500L IAW SRM 53-00-53-2R-5 AND SRM 51-40-02-0G-0.
- [SDR CALA2026070717571](https://openairdocs.org/sdr/CALA2026070717571.md): Floorbeam · corroded · Jun 9, 2026 · N37521 · Boeing 7379 · Fuselage Main, Floor Beam
  > FOUND DAMAGE CORROSION AT AFT WET AREA FLOORBEAM BS 947 RBL 50 TO BE OUT OF LIMITS, REPAIRED WET AREA FLOORBEAM STA 947 BETWEEN LBL 7.8 TO RBL 55 IAW SRM 53-70-51-2R-5 THIS REPAIR IS CATEGORY A REPAIR NO FOLLOW ACTION REQUIRE.
- [SDR CALA2026061016990](https://openairdocs.org/sdr/CALA2026061016990.md): Channel · corroded · Jun 9, 2026 · N37521 · Boeing 7379 · Fuselage Miscellaneous Structure
  > FOUND DAMAGE CORROSION AT THE AFT CARGO LH ZEE CHANNEL STA 727H TO 847. REMOVED AND REPLACED ZEE CHANNEL LH SIDE AT AFT CARGO COMPARTMENT BTW STA 727 TO STA 847 IAW SRM 53-00-53-2R-5 REPAIR 5, FIG 202 AND SRM 51-40-02-0G-0 STEP 4 AND STEP 7
- [SDR CALA2026061016988](https://openairdocs.org/sdr/CALA2026061016988.md): Floor Support · corroded · Jun 9, 2026 · N37521 · Boeing 7379 · Fuselage Miscellaneous Structure
  > FOUND CORROSION AT THE MID LOWER AFT BULKHEAD SUPPORT PANEL AT STA 500L. REMOVED AND REPLACED LOWER RAIL ASSY OF MID LOWER AFT BULKHEAD PANEL AT STA. 500L. IAW SRM 51-40-02-0G-0 STEPS 4 &7, 51-40-05-0G-0 AND 51-40-08-0G-0.
- [SDR CALA2026061016986](https://openairdocs.org/sdr/CALA2026061016986.md): Channel · corroded · Jun 9, 2026 · N37521 · Boeing 7379 · Fuselage Miscellaneous Structure
  > FOUND DAMAGE CORROSION AT THE AFT CARGO RH ZEE CHANNEL BTW STA 727 TO STA 767. REMOVED AND INSTALLED NEW ZEE CHANNEL ON AFT CARGO BTW STA 727 TO STA 767 IAW B737-9MAX SRM SRM 53-00-53-2R-5 STEP 4, (L) AND SRM 51-40-02-0G-0 STEP 4
- [SDR CALA2026061016984](https://openairdocs.org/sdr/CALA2026061016984.md): Floorbeam · corroded · Jun 9, 2026 · N37521 · Boeing 7379 · Fuselage Main, Floor Beam
  > CORROSION ON AFT WET AREA FLOOR SUPPORT AT STA 950 BTW LBL 26 TO LBL 50, REQUIRE EVALUATION. REMOVED AND REPLACED FLOOR SUPPORT ON AFT WET AREA STA 950 BTW LBL 26 TO LBL 50, APPLIED ALODINE AND PRIMER IAW DWG 147A5676 REV A, DWG 147A5650 REV: A. AND SRM 51-40
- [SDR CALA2026051416231](https://openairdocs.org/sdr/CALA2026051416231.md): Unknown · unknown · May 10, 2026 · N37521 · Boeing 7379 · Emergency Exits
  > PAX REPORTS A NOTABLE AMOUNT OF WATER CAME OUT OF THE HANDLE FOR THE OVERWING EMERGENCY EXIST AT 20F. OCCURRED ON DESCENT THROUGH APPROXIMATELY FL180. PERFORMED INTERNAL ZONAL INSPECTION REF AMM TADK 05-41-08-210-809, ALSO PERFORMED EXTERNAL ZONAL INSPECTION R
- [SDR CALA2026041315333](https://openairdocs.org/sdr/CALA2026041315333.md): Skin · dented · Apr 12, 2026 · N37521 · Boeing 7379 · Fuselage Main, Plate/Skin
  > SMALL DENT REPORTED BY CATERING PICTURED BELOW.DAMAGE ON DOOR 2 L LOCATION OF DAMAGE IS AFT OF 2 L DOOR ABOUT 18 INCHES AT STA 1010 AND S-13L FOUND TO BE 2 IMPACTS CAUSING 2 DENTS WITH GOUGES IN THE BOTTOM OF THEM. REMOVED GOUGES REF SRM 53-00-01-1A-1. UPON QC
- [SDR CALA2025110610943](https://openairdocs.org/sdr/CALA2025110610943.md): Unknown · odor · Nov 3, 2025 · N37521 · Boeing 7379 · Air Conditioning System
  > JET FUEL ODOR IN AFT GALLEY AREA DURING TAKEOFF AND LANDING. PERFORMED APU DRAIN MAST INSPECTION IN REF AMM 49-16-11. NO FUEL LEAK DETECTED PERFORMED SMOKE OR FUMES IN CABIN CONDITIONAL INSPECTION IN REF AMM 05-51-56. NO FUEL FUMES DETECTED IN CABIN. ENGINE RU
- [SDR CALA2025100209566](https://openairdocs.org/sdr/CALA2025100209566.md): Megaphone · damaged · Oct 1, 2025 · N37521 · Boeing 7379 · Emergency Equipment
  > FWD CABIN MEGAPHONE TEST FUNCTION, DAMAGED, MEGAPHONE STUCK IN TEST. REPLACED FWD MEGAPHONE IAW AMM 25-64-00-710-801.
- [SDR CALA2025041603891](https://openairdocs.org/sdr/CALA2025041603891.md): Bolt · missing · Apr 15, 2025 · N37521 · Boeing 7379 · Emergency Equipment
  > R2 SLIDE FABRIC LOOSE. INSTALLED MISSING HARDWARE ON SLIDE LANYARD. REF. IPC 25-66-01-03 PARTS USED: 00-0595-3-4727,QTY:1 00-0593-3-2150,QTY:1 INSTALLED MISSING HARDWARE AT R2 DOOR SLIDE
- [SDR CALA2025032103066](https://openairdocs.org/sdr/CALA2025032103066.md): Slide · faulty · Mar 19, 2025 · N37521 · Boeing 7379 · Escape Slide
  > DOOR L2 ESCAPE SLIDE ASSY REPLACED ON JC 43-2566-1-0001 WITH RII INSPECTION ACCOMPLISHED. LOG PAGE IS TO CAPTURE. ROTABLE PARTS INFORMATION. UPDATED.PARTS USED: 29-2566-9-0006, QTY:1 ROTABLE PARTS CHG:TT # 1444732 SN OFF 5761 PN OFF 29-2566-9-0006.SLIDE, FWD
- [SDR CALA2025032103065](https://openairdocs.org/sdr/CALA2025032103065.md): Screw · short · Mar 19, 2025 · N37521 · Boeing 7379 · Escape Slide
  > INSTALLATION OF THE ESCAPE SLIDE PACK - L2 DOOR SLIDE PACK ASSY, LH ATTACHMENT BOLT IS INCORRECT LENGTH (TOO SHORT) REF: IPC 25-66-01-03. INSTALLED CORRECT AFT SCREW IN L2 DOOR SLIDE REF IPC AND JOB CARD 43-2566-1-0001.PARTS USED: 00-0583-3-9743, QTY:1
- [SDR CALA2025031702843](https://openairdocs.org/sdr/CALA2025031702843.md): Oven · sparks · Mar 13, 2025 · N37521 · Boeing 7379 · Buffet/Galleys
  > OVEN SMOKING OR SPARKING FORWARD RIGHT GALLEY G2 OUTBD OVEN HAD STRONG EL EC/WIRNG BURNING ODOR W/ O ITEMS INSIDE. NO SMOKE. CB-S PULLED-BOTH OV REQUESTING NEF GALLEY OVEN #1 204 NOC.TOMC APPROVED. PUSHED IN GALLEY OVEN #2 205 C/B AND PERFORMED OPS CHECK. OPS
- [SDR CALA2024101400832](https://openairdocs.org/sdr/CALA2024101400832.md): Fan · faulted · Oct 12, 2024 · N37521 · Boeing 7379 · Air Distribution Fan
  > STRONG ELEC SMELL IN CABIN ROWS 22-27 QRH RAN AT FL350 THEN DI VERT TO DENFLIGHT AND CABIN CREWS COMPLIED WITH SMOKE ODOR QUESTIONAIRE SEE PICS FIM 21-00- TASK 830 NEEDS COMPLIED WITH REMOVED AND REPLACED RELAY R560 REF SWPM 20-81-11 AND AIPC 24-21-21-61A. R
- [SDR CALA2022102402912](https://openairdocs.org/sdr/CALA2022102402912.md): None · none · Oct 22, 2022 · N37521 · Boeing 737 · Fuselage Main, Plate/Skin
  > JETBRIDGE SCRATCHED PAINT NEXT TO DOOR 1L METAL SHOWING REF FIGURE 103 SECTION B, AC CAN BE OPERATED FOR 50 FLT HOURS PER SRM LIMITS. INSPECTED DAMAGE PER SRM 53-00-01-1A-1. LOCATION OF DAMAGE STA 360 AC LEFT, BELOW STRINGER 7L. CLEANED AREA. SCRACHES FOUND. D
- [SDR CALA2022020700341](https://openairdocs.org/sdr/CALA2022020700341.md): Warning Message · activation error · Feb 7, 2022 · N37521 · Boeing 7379 · Central Warning
  > WHEN SETTING TO THRUST WE RECIEVED THE TO CONFIG WARNING. CONTACT TOMC TO UNLOCK FOR SIGNOFF. UNLOCKING FOR SIGNOFF REF LOG. 7928334 FOR PSEU R/R. PERFORMED TAKEOFF WARNING SYS CHECK IAW 31-51-00-720-803 AND TEST PASS. OK FOR SVC. ADD FAULT:32-02001
- [SDR CALA2022020400320](https://openairdocs.org/sdr/CALA2022020400320.md): Warning System · false indication · Feb 3, 2022 · N37521 · Boeing 7379 · Central Warning
  > TAKE OFF WARNING HORN SOUNDING AT ALL TIMES...CYCLED FLIGHT CONTROLS, PARKING BRAKE, STAB TRIM....NO HELP ACP TS PER IFM 31-50-00-810-803. MAINTENANCE MESSAGE FAULT CODE 315 102 00. PSEU PARKING BRAKE A AND B SIGNAL DISAGREE. ACP BITE OF PSEU AND NO FAULTS. A
- [SDR CALA2022012600242](https://openairdocs.org/sdr/CALA2022012600242.md): Tail Cone · damaged · Jan 26, 2022 · N37521 · Boeing 7379 · Fuselage Miscellaneous Structure
  > POSSIBLE TAIL STRIKE PERFORMED TASK 05-51-32-210-801 AND: TAIL SKID INSPECTION, TASK 05-51-32-210-802. NO EVIDANCE OF STRIKE FOUND. SHOE IS CLEAN AND WITHOUT SCRAPS CARTRIDGE IS IN GREEN BAND VISUAL INSP OF ACT FOUND NORMAL. SEE ATTACHED PIC.
- [SDR CALA2021080901301](https://openairdocs.org/sdr/CALA2021080901301.md): Cover · loose · Aug 9, 2021 · N37521 · Boeing 7379 · Emergency Lighting
  > REVIEW ALL DISCREPANCIES RECORDED AND INITIATE SFR/SDR REPORTS AS REQUIRED, PER GMM 04-20-05 AND GMM 04-20-16. - PAX SEAT EPL SHROUD LOOSE ON AISLE SEATS, 8,10,12,14,20,22,23,26,28,29,32,35C AND 12,20,27,29,31,36D. SECURED ALL EPL SHROUDS LISTED ABOVE IAW CMM

## 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 = 'N37521' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N37521/reports

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