# Service difficulty reports: N23721

A list on [N23721](https://openairdocs.org/aircraft/N23721.md).

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

Page 1 of 2 · 100 reports

- [SDR CALA2026020213491](https://openairdocs.org/sdr/CALA2026020213491.md): Adiru · faulted · Jan 30, 2026 · N23721 · Boeing 737724 · Integrated Flight System
  > AFTER TAKE OFF, BOTH CA & FO LOST BOTH HEADING AND LATERAL INDICATIONS, FO DATA CAME BACK. ACP DCFS BITE, BPCS, GCU 1 & 2, NO FAULTS. LT ADIRU HAS ENTER HEADING FAULT ON LAST LEG MAIT MESSAGE 34-21009 FIM 34-21 TASK 808 INITIAL EVALUATION SHOWED NO CURRENT
- [SDR CALA2025120811861](https://openairdocs.org/sdr/CALA2025120811861.md): Stringer · corroded · Dec 5, 2025 · N23721 · Boeing 737724 · Fuselage Main, Longeron/Stringer
  > STRINGER 27L HAS CORROSION BETWEEN BS 360 & 380 AT PRODUCTION SPLICE. CUT STRINGER 27L FROM BS 338 TO FACTORY SPLICE AND FROM FACTORY SPLICE IAW SRM 51-10-02. STR 27L FWD OF FACTORY SPLICE WILL NOW BE COVERED BY LOG PAGE 7064237. PERFORMED HFEC INSPECTION OF
- [SDR CALA2025120811845](https://openairdocs.org/sdr/CALA2025120811845.md): Skin · cracked · Dec 2, 2025 · N23721 · Boeing 737724 · Fuselage Main, Plate/Skin
  > DURING HOLE PROBE INSPECTION FOUND DEFECT IN ONE FASTENER COMMON TO S-27L AT STA 372 AND ONE FASTENER COMMON TO SHEAR TIE AT BS 372 ABOVE S27AS IAW SRM 51-10-02, REAMED HOLE IN SHEAR TIE AREA, SKIN ONLY, TO.233" CRACK INDICATION GONE, REAMED HOLE IN STR 27L,
- [SDR CALA2025120811835](https://openairdocs.org/sdr/CALA2025120811835.md): Stringer · corroded · Nov 24, 2025 · N23721 · Boeing 737724 · Fuselage Main, Longeron/Stringer
  > STRINGER 25L HAS CORROSION BETWEEN BS 360 & 380. CUT OUT DAMAGE FROM STR 25L IAW SRM 53-00-03-2R-1, STEP 4 A & B. PERFORMED HFEC INSPECTION OF CUT EDGE OF STRINGER IAW NDT MANUAL PART 6, 51-00-00 PROC 23, NO DEFECTS NOTED. FABRICATED, LOCATED, DRILLED, TRE
- [SDR CALA2025120811833](https://openairdocs.org/sdr/CALA2025120811833.md): Stringer · corroded · Nov 24, 2025 · N23721 · Boeing 737724 · Fuselage Main, Longeron/Stringer
  > STRINGER 26L HAS CORROSION BETWEEN BS 360 AND 380. REMOVED DAMAGED SECTION OF STR 26L IAW SRM 53-00-03-2R-1 STEP 4 A&B. HFEC REQUIRED AT CUT EDGE OF DMG REMOVAL IAW SRM 53-00-03-2R-1 STEP 4C. PERFORMED HFEC INSPECTION OF CUT EDGE OF STRINGER IAW NDT MANUAL
- [SDR CALA2025120811831](https://openairdocs.org/sdr/CALA2025120811831.md): Stringer · corroded · Nov 24, 2025 · N23721 · Boeing 737724 · Fuselage Main, Longeron/Stringer
  > STRINGER 27L HAS CORROSION AT BS 360. REMOVED DAMAGED SECTION OF STRINGER 27L IAW SRM 51-10-02, STEP 4C. PERFORMED HFEC INSPECTION OF CUT EDGE OF STRINGER IAW NDT MANUAL PART 6, 51-00-00 PROC 23, NO DEFECTS NOTED. ACCOMPLISHED PART -A- STEP 6 OF AVO 721-25-
- [SDR CALA2025102310444](https://openairdocs.org/sdr/CALA2025102310444.md): Door Frame · cracked · Oct 22, 2025 · N23721 · Boeing 737724 · Fuselage Main, Structure
  > CRACK INDICATION NOTICED ON RT SIDE E-F POST NR 3 FASTENER HOLE. ACCORDING WITH EA 5310-08195 REV. OP 004 STEP B (26). IF CRACK IS OBSERVED AFTER IT WAS REAMED TO THE PRE COLD WORKED DIAMETER. COMPLIED WITH ECRA 5310-08708. REF AAR RFD NONROUTINE 1000048714.
- [SDR CALA2025102310442](https://openairdocs.org/sdr/CALA2025102310442.md): Frame · cracked · Oct 22, 2025 · N23721 · Boeing 737724 · Fuselage Main, Frame
  > CRACK INDICATION NOTICED ON THE LT SIDE E-F POST 3 AND 5 FASTENER HOLES. ACCORDING WITH EA 5310-08195 REV. OP 003 STEP B (26). IF CRACK IS OBSERVED AFTER IT WAS REAMED TO THE PRE COLD WORKED DIAMETER, COMPLIED WITH ECRA 5310-08709. REF AAR RFD NON ROUTINE 10
- [SDR CALA2025102110338](https://openairdocs.org/sdr/CALA2025102110338.md): Skin · delaminated · Oct 18, 2025 · N23721 · Boeing 737724 · Wing, Plate/Skin
  > LH WING, OUTBOARD FLAP, AFTER FLAP, INBOARD END, LOWER SKIN WITH 3 DISBOND AREAS, 7 X 11 INCHES, 4X 1 INCHES AND 1 X 1 INCH. CLEANED, PREPPED, REPAIRED AND RESTORED PAINT AT LH WING, OUTBOARD FLAP, AFTER FLAP, INBOARD END, LOWER SKIN IAW SRM 57-53-01-2R-16, SR
- [SDR CALA2025102110334](https://openairdocs.org/sdr/CALA2025102110334.md): Skin · debonded · Oct 17, 2025 · N23721 · Boeing 737724 · Wing, Plate/Skin
  > RIGHT WING, OUTBOARD FLAP, AFTER FLAP, INBOARD END, LOWER SKIN WITH DISBOND AREAS. 11 X 1INCHES, 2.5 X 2.5 INCHES. CLEANED, PREPPED, REPAIRED AND RESTORED PAINT AT RH WING, OUTBOARD FLAP, AFTER FLAP, INBOARD END, LOWER SKIN IAW SRM 57-53-01-2R-16, SRM 51-70-
- [SDR CALA2025102110333](https://openairdocs.org/sdr/CALA2025102110333.md): Skin · delaminated · Oct 17, 2025 · N23721 · Boeing 737724 · Wing, Plate/Skin
  > RIGHT WING, OUTBOARD FLAP, AFTER FLAP, INBOARD END, UPPER SKIN WITH DISBOND AREA 4 X 3 INCHES. CLEANED, PREPPED, REPAIRED AND RESTORED PAINT AT RH WING, OUTBOARD FLAP, AFTER FLAP, INBOARD END, UPPER SKIN IAW SRM 57-53-01-2R-16, SRM 51-70-10-2R-0, AMM 51-21-41
- [SDR CALA2025081807883](https://openairdocs.org/sdr/CALA2025081807883.md): Track · dirty · Aug 14, 2025 · N23721 · Boeing 737724 · Passenger/Crew Doors
  > FWD ENTRY LIGHT AND ASSOCIATED CAUTION AT APROX V1. IT WENT OUT APROX 2000FT. OPS NORMAL. CLEANED DOOR TRACKS AND PERFORMED OPERATIONAL CHECK PER AMM 52-11-00, NO DEFECTS NOTED. OPENED AND CLOSED DOOR SEVERAL TIMES FROM INSIDE AND OUTSIDE WITH NO ISSUES.
- [SDR CALA2025052304917](https://openairdocs.org/sdr/CALA2025052304917.md): Warning Light · false activation · May 20, 2025 · N23721 · Boeing 737724 · Door Warning System
  > FWD ENTRY DOOR LIGHT ILLUMINATED ON TAKEOFF AT APPROX 110 KNOTS RESOLVED ON CLIMBOUT VERIFIED L1 DOOR OPERATION IS NORMAL. DOOR SWITCH AND ANNUNTIATOR LIGHT OPERATION NORMAL AS WELL. NO PREVIOUS HISTORY. REF AMM 52-11-00/201.
- [SDR CALA2024080500372](https://openairdocs.org/sdr/CALA2024080500372.md): Warning Message · illuminated · Aug 2, 2024 · N23721 · Boeing 737724 · Doors
  > FWD ENTRY DOOR ON T/O ROLL AT 50KNOTS LOCKED BY TOMC. UNLOCKED BY TOMC REQUEST MEL FOR L1 DOOR INDICATION. STICKER APPLIED NO DEACTIVATION OF SWITCH REQUIRED. NO ENTRY DOOR RELATED ATA 52 HISTORY FOR THE LAST 30 DAYS. PLACED ON MEL, VERIFIED DOOR CLOSED. PERF
- [SDR CALA2024021300409](https://openairdocs.org/sdr/CALA2024021300409.md): Stringer · corroded · Feb 10, 2024 · N23721 · Boeing 737724 · Fuselage Main, Longeron/Stringer
  > SUPPORT TASK: CORROSION ON STRINGER 25 LEFT STATION 927-967 AREA AFT OF AFT CARGO PIT. TRANSCRIBED FROM HAECO GSO NRC# 9286923 FABRICATED REPAIR HAT SECTION SPLICES, ANGLE SPLICES AND REPLACE MENT STRINGER SECTIONS IAW B737-700 SRM 53-00-03-2R-1. INSTALLED AL
- [SDR CALA2024021200397](https://openairdocs.org/sdr/CALA2024021200397.md): Beam · cracked · Feb 9, 2024 · N23721 · Boeing 737724 · Cargo/Baggage Doors
  > SUPPORT TASK AFT CARGO DOOR UPPER BEAM "A" PN 146N6110-14 IS CRACKED. TRANSCRIBED FROM HAECO GSO NRC# 9286950.
- [SDR CALA2024021200393](https://openairdocs.org/sdr/CALA2024021200393.md): Crease Beam · corroded · Feb 9, 2024 · N23721 · Boeing 737724 · Fuselage Main, Structure
  > SUPPORT TASK: MAIN CABIN STA 980 RBL-60 CREASE BEAM INNER CHORD CORRODED. CREASE BEAM FOUND TO BE OUT OF LIMITS PER SRM 53-70-51- IAW BAC DWG 147A8501 REV A AND B737-700 SRM 51-40-05. INSTALLED 1A-1. REMOVED CREASE BEAM AND CREASE BEAM STRAP IAW B737-700 SR
- [SDR CALA2024021200392](https://openairdocs.org/sdr/CALA2024021200392.md): Web · corroded · Feb 9, 2024 · N23721 · Boeing 737724 · Fuselage Miscellaneous Structure
  > SUPPORT TASK: MAIN CABIN FLOOR STA 990 RBL 30-35 CORROSION NOTED. TRANSCRIBED FROM HAECO GSO NRC# 9286618 REMOVED CORROSION FROM WEB STA 990 RBL 30-35. ORIGINAL MATERIAL THICKNESS.020, REMOVED.010 OUT OF LIMITS IAW SRM 53-7 0-15. FABRICATED AND INSTALLED
- [SDR CALA2024021200389](https://openairdocs.org/sdr/CALA2024021200389.md): Floorbeam · corroded · Feb 9, 2024 · N23721 · Boeing 737724 · Fuselage Main, Floor Beam
  > SUPPORT TASK: MAIN CABIN FLOOR STA 986 RBL 40-60 CORROSION NOTED. TRANSCRIBED FROM HAECO GSO NRC# 9286615. REMOVED CORROSION FROM MAIN CABIN FLOORBEAM UPPER SURFACE AT STA B737-700 SRM 53-70-51.. ORIGINAL MATERIAL THICKNESS.150, REMOVED.020, REMAINING.1
- [SDR CALA2024020800354](https://openairdocs.org/sdr/CALA2024020800354.md): Floorbeam · corroded · Feb 6, 2024 · N23721 · Boeing 737724 · Fuselage Main, Floor Beam
  > SUPPORT TASK: MAIN CABIN FLOOR STA 947 RBL 50-60 HAS CORROSION. TRANSCRIBED FROM HAECO GSO NRC# 9286594. REMOVED CORROSION AT MAIN CABIN FLOOR STA 947 RBL 50-60 FLOORBEA T-CHORD IAW B737-700 SRM 53-70-51-2R-5. ALODINED AND PRIMED ALL GSO MECH V900535 INSP QC0
- [SDR CALA2024020500314](https://openairdocs.org/sdr/CALA2024020500314.md): Angle · corroded · Feb 1, 2024 · N23721 · Boeing 737724 · Fuselage Miscellaneous Structure
  > SUPPORT TASK: MAIN CABIN FWD WET AREA L-1 DOOR SILL STA 303.9 T O 348.2 LBL-60 HAS CORROSION. TRANSCRIBED FROM HAECO GSO NRC# 9 286673 REMOVED CORROSION FROM THE L-1 DOOR SILL INNER CHORD AND FOUND T INNER CHORD PER B737-700 SRM 51-40-02-0G, 51-40-03-0G AND
- [SDR CALA2024013100269](https://openairdocs.org/sdr/CALA2024013100269.md): Support Angle · corroded · Jan 30, 2024 · N23721 · Boeing 737724 · Fuselage Miscellaneous Structure
  > SUPPORT TASK: MAIN CABIN FWD WET AREA, L-1 DOOR SILL SUPPORT ANGLE STA 271 TO 344 LBL-60 IS CORRODED. TRANSCRIBED FROM HAECO G SO NRC# 9286912. REMOVED CORROSION FROM ANGLE AND FOUND TO BE OUT OF LIMITS PER B 141A8112-20. HAECO GSO MECH V934822 737-700 SRM
- [SDR CALA2024013100268](https://openairdocs.org/sdr/CALA2024013100268.md): Door Frame · gouged · Jan 30, 2024 · N23721 · Boeing 737724 · Fuselage Main, Structure
  > (B737-52-3-0727) L-1 DOOR, DOORFRAME GOUGED AT THE UPPER HINGE C UTOUT. TRANSCRIBED FROM HAECO GSO NRC# 9286609. REMOVED GOUGED FWD FRAME IAW B737-700 SRM 51-40-02. LOCATED, DRI CMM 52-16-12. HAECO GSO MECH V896596 INSP QC002 LLED AND INSTALLED NEW 141A6110U
- [SDR CALA2024013100264](https://openairdocs.org/sdr/CALA2024013100264.md): Pan · corroded · Jan 30, 2024 · N23721 · Boeing 737724 · Passenger/Crew Doors
  > (B737-52-3-0727) L-1 DOOR EXTERNAL HANDLE PAN HAS SURFACE CORROSION. REMOVED WORN HANDLE PAN REF B737-700 SRM 51-40-02. REMOVED SEAL PLATE REF B737-700 SRM 51-40-02 AND BAC DWG 141A6210 REV D. INST ALLED NEW HANDLE PAN AND SEAL PLATE REF B737-700 SRM 51-40-0
- [SDR CALA2024012400216](https://openairdocs.org/sdr/CALA2024012400216.md): Floorbeam · corroded · Jan 23, 2024 · N23721 · Boeing 737724 · Fuselage Miscellaneous Structure
  > SUPPORT TASK: MAIN CABIN FLOOR STA 947 LBL5-RBL10 HAS CORROSION. TRANSCRIBED FROM HAECO GSO NRC# 9286596 EVALUATED CORROSION AT STA 947 LBL5-RBL10, ORIG MAT.018, REMOVE D.017, REMAINING.0163 FOUND TO BE OUT OF LIMITS IAW B737-700 S RM 53-70-51-1A-1. INSTAL
- [SDR CALA2024012200162](https://openairdocs.org/sdr/CALA2024012200162.md): Pan · corroded · Jan 17, 2024 · N23721 · Boeing 737724 · Passenger/Crew Doors
  > (B737-52-3-0727) L-2 DOOR EXTERNAL HANDLE PAN HAS SURFACE CORROSION. TRANSCRIBED FROM HAECO GSO NRC# 9286598. REMOVED CORRODED PAN, RECEIVED NEW PAN AND INSTALLED NEW PAN IAW BAC DWG #147A6116 REV A AND B737-700 SRM 51-40-02-0G-0. HAECO GSO MECH V900908 INSP
- [SDR CALA2024021200399](https://openairdocs.org/sdr/CALA2024021200399.md): Skin · damaged · Jan 5, 2024 · N23721 · Boeing 737724 · Cargo/Baggage Doors
  > (SUPPORT TASK) RESKIN AFT CARGO DOOR PER AMM/SRM AND OR ENGINEERING INSTRUCTIONS, REF LOG PAGES 4545120 AND 4989266. TRANSCRIBED FROM HAECO GSO NRC# 9286093.
- [SDR CALA2024021200390](https://openairdocs.org/sdr/CALA2024021200390.md): Skin · dented · Jan 5, 2024 · N23721 · Boeing 737724 · Cargo/Baggage Doors
  > (SUPPORT TASK) RESKIN FWD CARGO DOOR PER AMM/SRM AND OR ENGINEERING INSTRUCTIONS, REF LOG PAGES 4246756 AND 4346895. TRANSCRIBE D FROM HAECO GSO NRC# 9286094. REMOVED AND REPLACED FW CARGO DOOR SKIN IAW BAC DWG# 143A6110 AN D B737-700 SRM 52-30-01-2R-3. PN# 1
- [SDR CALA2023103103240](https://openairdocs.org/sdr/CALA2023103103240.md): Hub Cap · missing · Oct 28, 2023 · N23721 · Boeing 737724 · Landing Gear System
  > LEFT MLG HUB CAP MISSING/BROKEN NO FURTHER DAMAGE NOTED APART FROM MISSING HUBCAP. REMOVED PLACED ON CDL. REMAINING PIECES FROM HUBCAP. DISPATCH DESK: 38 NAME: JL DATE: 28-OCT-23- TOMC APPROVED UPON INSPECTION, FOUND CENTRE CAP OF HUB CAP DAMAGED WITH MOST
- [SDR CALA2023051801553](https://openairdocs.org/sdr/CALA2023051801553.md): Water Heater · unknown · May 17, 2023 · N23721 · Boeing 737724 · Water and Waste System
  > FLASH OF LIGHT SMOKE AND ACRID SMELL FROM FOWARD LAV AT CRUISE PERFORMED VISUAL INSPECTION OF LAVATORY ( A) WIRING AND CREW. REMOVED AND REPLACED FIRST CLASS LAVATORY ( A) WATER COMPARTMENTS FOR BURNING & ARCING, NONE FOUND. TROUBLESHOT HEATER, REF AMM 3
- [SDR CALA2023050801400](https://openairdocs.org/sdr/CALA2023050801400.md): Slide · unknown · May 7, 2023 · N23721 · Boeing 737724 · Escape Slide
  > L2 DOOR SLIDE PARTIALLY DETACHED PICTURE ADDED CORRECTION L1 DOOR PHOTOS ADDED. REMOVED AND REPLACED D1L ESCAPE SLIDE PACK IN REF TO AMM 25-66-01-00-801 AND AMM 25-66-01-400-804 PARTS USED: 00-0594-3-6694,QTY:1 29-2560-3-0060,QTY:1 29-2566-9-0007,QTY:1
- [SDR CALA2022091602397](https://openairdocs.org/sdr/CALA2022091602397.md): None · none · Sep 16, 2022 · N23721 · Boeing 737 · Flight Control System
  > LEADING EDGE FLAPS TRANSIT LIGHT STAYS ON 1 LANDING WEIGHT 125K LANDING SPEED 150K NUMBER 7 LE SLAT T/S #7 SLAT INTRANSIT LIGHT, FOUND I/B POSSITION SENSOR WITH EXECIVE GAP LIMITS ARE 0.115 TO 0.135 IN FOUND GAP AT.0165 IN,MM 27-88-11-000-801. ORDERED SHIMS R
- [SDR CALA2022090902319](https://openairdocs.org/sdr/CALA2022090902319.md): None · none · Sep 9, 2022 · N23721 · Boeing 737 · Flight Control System
  > PASSING FL280 ON CLIMB LE FLAPS TRANSIT AND SLAT 7 INTRANSIT LTS ON RAN CHKLST NOT FIXED WERE AT FULL RETRACT AND FULL EXTEND PROX SENSORS SHOWED APPROPRIATE INDICATION PER FIM. SUGGEST REPLACE #7 O/B SENSOR PERFORMED BITE TEST OF FSEU GOT A FAULT OF SL7 PROX
- [SDR CALA2022090202236](https://openairdocs.org/sdr/CALA2022090202236.md): None · none · Sep 2, 2022 · N23721 · Boeing 737 · Stabilizer Position Indicating
  > STAB OUT OF TRIM MSG DIS PLAYED. UNABLE TO USE EL EC TRIM NOSE U P OR OVERRIDE. PILOT STATED STAB OUT OF TRIM LIGHT EXTINGUISHED WHEN ELECTRIC DFCS BITE SHOWS NO FAULTS ON CURRENT LEG. LEG 02 SHOWS FAULTS, CUTOUT SWITCHES ACTIVATED. WAS ABLE TO TRIM MANUALLY.
- [SDR CALA2022080801997](https://openairdocs.org/sdr/CALA2022080801997.md): None · faulty · Aug 8, 2022 · N23721 · Boeing 737 · Stabilizer Position Indicating
  > MAIN TRIM ON BOTH COLUMNS WOULD TRIM NOSE UP BUT NOT NOSE DOWN REPLACED STAB. TRIM MOTOR ASSY. OPS OPERATIONAL STATUS. CHECKS ALL GOOD.
- [SDR CALA2021070501032](https://openairdocs.org/sdr/CALA2021070501032.md): Circuit Card · unsecure · Jul 4, 2021 · N23721 · Boeing 737724 · Electrical Power System
  > ON CLIMB OUT MULTIPLE SYSTEMS ON THE OVERHEAD AND FWD PANEL ANN UNCIATORS FAILED T/S IAW SSM 30-41-11, 33-18-11, 32-61-11, 26-21-11, 32-42-11, 28-43-11, 27-81-31, AND 29-35-11. FOUND M564 NOT SECURED. RE-INSTALLED IAW AMM 33-18-00-960-806. ALL OPS CHECKS NORM
- [SDR CALA2021060700800](https://openairdocs.org/sdr/CALA2021060700800.md): Skin · damaged · Jun 6, 2021 · N23721 · Boeing 737724 · Cargo/Baggage Doors
  > ESFR ENTRY REQUIRED FOR SKIN REPAIR ON AFT CARGO DOOR. REFERENCE FLEETCYCLE NR 9776159 REFERENCE FLEETCYCLE NR 9776159 FOR ALL WORK ACCOMPLISHED. CARGO DOOR REPAIRED IN ACCORDANCE WITH SRM 52-00-01 REPAIR 3. ESFR RE PORTING PURPOSES ONLY.
- [SDR CALA2021053100751](https://openairdocs.org/sdr/CALA2021053100751.md): Crease Beam · cracked · May 29, 2021 · N23721 · Boeing 737724 · Fuselage Main, Structure
  > REF. FLEET CYCLE LOG PAGE 9775471. FOUND CRACK AT CREASE BEAM SHEAR WEB AT STA 500 TO 500A UNDER WINDOW #9. REPAIRED PER ECRA# 5311-02576. REQUIRES DIP FOR REINSPECT PER STEP 11 OF ECRA. PER STEP 11 OF ECRA# 5311-02576 ACCOMPLISH INSPECTION REQUIREMENTS ON OR
- [SDR CALA2020112001293](https://openairdocs.org/sdr/CALA2020112001293.md): Fitting · cracked · Nov 18, 2020 · N23721 · Boeing 737724 · Wing Miscellaneous Structure
  > SHEAR FITTING AT STA 540 LBL 6.14 IS CRACKED SPT 5866321. REMOVED CRACKED SHEAR FITTING AND INSTALLED NEW SHEAR FITTING, IAW B737-700 SRM 51-40-02 AND ECRA 5714-01166 REV ORIGINAL.
- [SDR CALA2020112001292](https://openairdocs.org/sdr/CALA2020112001292.md): Fitting · cracked · Nov 18, 2020 · N23721 · Boeing 737724 · Wing Structure
  > SHEAR FITTING AT STA 540 RBL 15.04 IS CRACKED SPT 5866320. REMOVED CRACKED SHEAR FITTING AND INSTALLED NEW SHEAR FITTING, IAW B737-700 SRM 51-40-02 AND ECRA 5714-01168 REV ORIGINAL.
- [SDR CALA2020112001291](https://openairdocs.org/sdr/CALA2020112001291.md): Fitting · cracked · Nov 18, 2020 · N23721 · Boeing 737724 · Wing Miscellaneous Structure
  > SHEAR FITTING AT STA 540 LBL 32.40 IS CRACKED SPT 5866322. REMOVED CRACKED SHEAR FITTING AND BRACKET AND INSTALLED NEW SHEAR FITTING AND BRACKET, IAW B737-700 SRM 51-40-02 AND ECRA 5714-01 167 REV ORIGINAL.
- [SDR CALA2020112001290](https://openairdocs.org/sdr/CALA2020112001290.md): Fitting · cracked · Nov 18, 2020 · N23721 · Boeing 737724 · Wing Miscellaneous Structure
  > SHEAR FITTING AT STA 540 RBL 6.14 IS CRACKED SPT 5866342. REMOVED CRACKED SHEAR FITTING AND INSTALLED NEW SHEAR FITTING, IAW B737-700 SRM 51-40-02 AND ECRA 5714-01170 REV ORIGINAL. SSFR REPORT FORM 46-0024 ENTERED BY UAL INSP U355204 11/18/2020 ACCOMPLISHED
- [SDR CALA2020112001289](https://openairdocs.org/sdr/CALA2020112001289.md): Fitting · cracked · Nov 18, 2020 · N23721 · Boeing 737724 · Wing Miscellaneous Structure
  > SHEAR FITTING AT STA 540 RBL 32.40 IS CRACKED SPT 5866319. REMOVED CRACKED SHEAR FITTING AND INSTALLED NEW SHEAR FITTING, IAW B737-700 SRM 51-40-02 AND ECRA 5714-01169 REV ORIGINAL. SSFR REPORT FORM 46-0024 ENTERED BY UAL INSP U355204 11/18/2020 ACCOMPLISHED
- [SDR CALA2020112001288](https://openairdocs.org/sdr/CALA2020112001288.md): Fitting · cracked · Nov 18, 2020 · N23721 · Boeing 737724 · Wing Miscellaneous Structure
  > SHEAR FITTING AT STA 540 LBL 15.04 IS CRACKED SPT 5866341. REMOVED CRACKED SHEAR FITTING AND INSTALLED NEW SHEAR FITTING, IAW B737-700 SRM 51-40-02 AND ECRA 5714-01171 REV ORIGINAL. SSFR REPORT FORM 46-0024 ENTERED BY UAL INSP U355204 11/18/2020 ACCOMPLISHED
- [SDR CALA2020091501097](https://openairdocs.org/sdr/CALA2020091501097.md): Audio Control · inoperative · Sep 8, 2020 · N23721 · Boeing 737724 · Audio Integrating System
  > ALL RADIOS INTERMITTANT, HAD TO DISC ALL HEADSETS TO COMMUNICATE AND STILL INTERMIT. RTB IAH FOUND F/O'S ASP, I/C SWITCH SELECTED CAUSES AUDIO FEEDBACK OVER SPEAKERS. LASO ASP IN NR 3 POSITION, ALT/NORM SW IS BROKEN. REMOVED AND REPLACED REMOTE ELECTRONIC
- [SDR CALA2020010600079](https://openairdocs.org/sdr/CALA2020010600079.md): Garlock Seal · leaking · Jan 3, 2020 · N23721 · Boeing 737724 · Turbine Engine Oil System
  > OIL QTY. ON ENG.1LOW FOUND IDG GARLOC LEAKING DURING ENG RUN. REMOVED IDG REF AMM 24-11-11 REMOVED AND REPLACED IDG SEALOL SEAL ASSY, REF AMM 72-60-00-400- 801-F00.NEED LEAK CHECK. ADD FAULT: N INSTALLED IDG REF AMM 24-11-11-400-801 UP TO STEP H. (10) INSTALLE
- [SDR CALA2018073001708](https://openairdocs.org/sdr/CALA2018073001708.md): Sensor · faulty · Jul 26, 2018 · N23721 · Boeing 737724 · Landing Gear Position and Warning
  > NOSE GEAR RED LIGHT ILLU MINATED IMMEDIATELY AFTER TAKEOFF. FOUND FAULT CODE 32-61013 IN FAULT HISTORY OF PSEU. T/S PER FIM 32-61-00-810-803. NOSE DOWN SENSOR NR 2 S853 SHOW NEAR WITH DEACTUATOR INSTALLED. REMOVED AND REPLACE NR 2 SYS NOSE GEAR DOWN SENSOR S85
- [SDR CALA2018041601171](https://openairdocs.org/sdr/CALA2018041601171.md): Bulkhead Web · cracked · Apr 15, 2018 · N23721 · Boeing 737724 · Fuselage Main, Bulkhead
  > PRESSURE BULKHEAD CRACKED BS 663, BETWEEN LBL 40 AND LBL 45.64. REPAIRED IAW SRM 57-10-10, REPAIR 3, ALTERNATIVE 2.
- [SDR CALA2018041301163](https://openairdocs.org/sdr/CALA2018041301163.md): Frame · cracked · Apr 12, 2018 · N23721 · Boeing 737724 · Fuselage Main, Frame
  > STUB FRAME, BS 294 LOWER FLANGE COMMON TO THE R1 DOOR ATTACH AREA WAS FOUND CRACKED. REPAIRED IAW EC/RA 5311-01919, PT 1.
- [SDR CALA2018040501100](https://openairdocs.org/sdr/CALA2018040501100.md): Window Frame · cracked · Apr 4, 2018 · N23721 · Boeing 737724 · Fuselage Main, Structure
  > CRACK FOUND AT THE CAPTAIN`S SIDE NR 1 WINDOW FRAME, UPPER O/B RADIUS. REPAIRED IAW EC/RA 5311-01916.

Next page: https://openairdocs.org/aircraft/N23721/reports.md?page=2

## 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 = 'N23721' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N23721/reports

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