# Service difficulty reports: N933NN A list on [N933NN](https://openairdocs.org/aircraft/N933NN.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 3 · 108 reports - [SDR AALA202605291727](https://openairdocs.org/sdr/AALA202605291727.md): Door · out of adjust · May 26, 2026 · N933NN · Boeing 737823 · Fixed Inner Doors > AIRCRAFT WAS NOT GROUNDED: FA ADVISED LAV D DOOR WONT OPEN W OUT EXCESSIVE FORCE. MAINTENANCE ADJUSTED DOOR ON LAV D IAW CMM 25-40-64. - [SDR AALA202508052760](https://openairdocs.org/sdr/AALA202508052760.md): Light · dislodged · Aug 3, 2025 · N933NN · Boeing 737823 · Emergency Lighting > AIRCRAFT WAS NOT GROUNDED: CEILING LIGHT ABOVE ROW 27 DEF HANGING DOWN FROM IT'S MOUNTED POSITION. REMOVE AND REPLACED EMERGENCY AISLE LIGHT. PER AMM 33-51-03. OPERATIONAL CHECK GOOD. - [SDR AALA202507213532](https://openairdocs.org/sdr/AALA202507213532.md): Intercostal · corroded · Jul 13, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CORROSION ON AFT CARGO COMPARTMENT INTERCOSTAL AT BS 927, S27L. REPLACED INTERCOSTAL PER SRM 51-40-02. - [SDR AALA202507216450](https://openairdocs.org/sdr/AALA202507216450.md): Angle · cracked · Jul 11, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CRACK IN WING CENTER SECTION REAR SPAR VAPOR BARRIER ATTACH ANGLE AT STA 663.5, RBL 8. REPAIRED PER SRM 57-10-10-2R-5. - [SDR AALA202507118452](https://openairdocs.org/sdr/AALA202507118452.md): Floorbeam · cracked · Jul 10, 2025 · N933NN · Boeing 737823 · Fuselage Main, Floor Beam > AIRCRAFT IN BASE MAINTENANCE: CRACK IN PASSENGER CABIN FLOOR STRUCTURE BREAK ASSEMBLY PANEL AT BS 540, LBL 1. REPLACED BREAK ASSEMBLY PANEL PER AARD 51-00-05-1. - [SDR AALA202507118503](https://openairdocs.org/sdr/AALA202507118503.md): Floor Support · cracked · Jul 10, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CRACK IN PASSENGER CABIN FLOOR SUPPORT AT BS 540, RBL 1. REPLACED SUPPORT PER AARD 51-00-05-1. - [SDR AALA202507116491](https://openairdocs.org/sdr/AALA202507116491.md): Floor Support · cracked · Jul 8, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CRACK IN PASSENGER CABIN FLOOR STRUCTURE INTERCOSTAL FROM BS 312 TO BS 328 AT RBL 20. REPLACED INTERCOSTAL PER AARD 51-00-05-1. - [SDR AALA202507119489](https://openairdocs.org/sdr/AALA202507119489.md): Floor Support · cracked · Jul 8, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CRACK IN PASSENGER CABIN FLOOR STRUCTURE INTERCOSTAL FROM BS 294 TO BS 276 AT BL 0. REPLACED INTERCOSTAL PER AARD 51-00-05-1. - [SDR AALA202507117607](https://openairdocs.org/sdr/AALA202507117607.md): Floor Support · cracked · Jul 8, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CRACK IN PASSENGER CABIN FLOOR STRUCTURE INTERCOSTAL FROM BS 312 TO BS 328 AT LBL 20. REPLACED INTERCOSTAL PER AARD 51-00-05-1. - [SDR AALA202507118432](https://openairdocs.org/sdr/AALA202507118432.md): Floor Support · cracked · Jul 8, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CRACK IN PASSENGER CABIN FLOOR STRUCTURE INTERCOSTAL FROM BS 328 TO BS 344 AT LBL 20. REPLACED INTERCOSTAL PER AARD 51-00-05-1. - [SDR AALA202507117738](https://openairdocs.org/sdr/AALA202507117738.md): Floor Support · cracked · Jul 8, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CRACK IN PASSENGER CABIN FLOOR STRUCTURE INTERCOSTAL UPPER ANGLE FROM BS 380 TO BS 400 AT LBL 9. REPLACED ANGLE PER AARD 51-00-05-1. - [SDR AALA202507230870](https://openairdocs.org/sdr/AALA202507230870.md): Transition Panel · corroded · Jul 4, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CORROSION ON FORWARD CARGO COMPARTMENT TRANSITION PANEL FROM BS 500B TO BS 500C, AT S27L. REPLACED TRANSITION PANEL PER SRM 53-00-53. - [SDR AALA202507230701](https://openairdocs.org/sdr/AALA202507230701.md): Transition Panel · corroded · Jul 4, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CORROSION ON FORWARD CARGO COMPARTMENT TRANSITION PANEL AT BS 495 PLUS 15 INCHES, AT S27L. REPLACED TRANSITION PANEL PER SRM 53-00-53-1A-2. - [SDR AALA202507210254](https://openairdocs.org/sdr/AALA202507210254.md): Web · corroded · Jul 4, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CORROSION ON FORWARD CARGO COMPARTMENT DOOR OPENING THRESHOLD WEB FROM BS 440 TO BS 480 AT RBL 36. REPLACED WEB PER AARD 51-00-05-1. - [SDR AALA202507167449](https://openairdocs.org/sdr/AALA202507167449.md): Transition Panel · corroded · Jul 4, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CORROSION ON FORWARD CARGO COMPARTMENT TRANSITION PANEL FROM BS 500E TO BS 500F AT RBL 22. REPLACED TRANSITION PANEL PER SRM 53-00-53-2R-5 AND AARD 51-00-05-1. - [SDR AALA202507140727](https://openairdocs.org/sdr/AALA202507140727.md): Transition Panel · corroded · Jul 4, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CORROSION ON FORWARD CARGO COMPARTMENT TRANSITION PANEL AT BS 500E, S24R, RBL 32. REPAIRED TRANSITION PANEL PER SRM 53-00-53-2R-5. - [SDR AALA202507238804](https://openairdocs.org/sdr/AALA202507238804.md): Transition Panel · corroded · Jul 3, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CORROSION ON FORWARD CARGO COMPARTMENT TRANSITION PANEL FROM BS 500G TO BS 500H, AT S27L. REPLACED TRANSITION PANEL PER SRM 51-10-02. - [SDR AALA202507235371](https://openairdocs.org/sdr/AALA202507235371.md): Transition Panel · corroded · Jul 3, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CORROSION ON FORWARD CARGO COMPARTMENT TRANSITION PANEL FROM BS 500F TO BS 500G, AT S27L. REPLACED TRANSITION PANEL PER SRM 53-00-53-1A-2. - [SDR AALA202507143506](https://openairdocs.org/sdr/AALA202507143506.md): Intercostal · corroded · Jul 3, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CORROSION ON AFT CARGO COMPARTMENT INTERCOSTAL AT BS 924, S27L, LBL 3. REPLACED INTERCOSTAL PER AARD 51-00-05-1. - [SDR AALA202507114914](https://openairdocs.org/sdr/AALA202507114914.md): Shield · corroded · Jul 3, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CORROSION ON AFT CARGO COMPARTMENT SHIELD FROM BS 767 TO BS 787, AT S25R. REPLACED SHIELD PER AARD 51-00-05-1. - [SDR AALA202507096600](https://openairdocs.org/sdr/AALA202507096600.md): Shim · migrated · Jul 3, 2025 · N933NN · Boeing 737823 · Vertical Stabilizer Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: VERTICAL STABILIZER RIGHT HAND REAR SPAR TERMINAL FITTING HAS SHIM WASHERS MIGRATING OUT FROM THE AFT SIDE OF THE OUTBOARD LUG. INSTALLED SHIMS AND ALL HARDWARE. PER AMM 53-30-00. - [SDR AALA202507089195](https://openairdocs.org/sdr/AALA202507089195.md): Window · crazed · Jul 3, 2025 · N933NN · Boeing 737823 · Door Windows > AIRCRAFT IN BASE MAINTENANCE: RIGHT HAND FORWARD EMERGENCY EXIT WINDOW CRAZED. REMOVED AND REPLACED RIGHT HAND FORWARD EMERGENCY EXIT WINDOW. PER AMM 56-22-00. - [SDR AALA202507089745](https://openairdocs.org/sdr/AALA202507089745.md): Window · crazed · Jul 3, 2025 · N933NN · Boeing 737823 · Door Windows > AIRCRAFT IN BASE MAINTENANCE: RIGHT HAND AFT EMERGENCY EXIT WINDOW CRAZED. REPLACED RIGHT HAND AFT EMERGENCY EXIT WINDOW. PER AMM 56-22-00. - [SDR AALA202507147481](https://openairdocs.org/sdr/AALA202507147481.md): Shear Web · corroded · Jul 2, 2025 · N933NN · Boeing 737823 · Fuselage Miscellaneous Structure > AIRCRAFT IN BASE MAINTENANCE: CORROSION OF AFT GALLEY SHEAR WEB AT BS 986, RBL 32. REPAIRED WEB PER EA 366091. - [SDR AALA202506058731](https://openairdocs.org/sdr/AALA202506058731.md): Door · lack of lube · Jun 4, 2025 · N933NN · Boeing 737823 · Fixed Inner Doors > AIRCRAFT WAS NOT GROUNDED: AFT LAVATORY-D DOOR STICKS AND IS DIFFICULT TO OPEN AND CLOSE. ACCOMPLISHED LAVATORY-D LUBE OF DOOR AND HINGES. PER AMM 25-40-14. - [SDR AALA202504229926](https://openairdocs.org/sdr/AALA202504229926.md): Door · out of adjust · Apr 21, 2025 · N933NN · Boeing 737823 · Fixed Inner Doors > AIRCRAFT WAS NOT GROUNDED: LAVATORY-D DOOR IS DIFFICULT TO OPEN AND CLOSE. ADJUSTED LAVATORY-D DOOR. OPERTIONAL CHECK GOOD. - [SDR AALA202410237043](https://openairdocs.org/sdr/AALA202410237043.md): Door · lack of lube · Oct 22, 2024 · N933NN · Boeing 737823 · Fixed Inner Doors > AIRCRAFT WAS NOT GROUNDED: AFT LEFT LAVATORY DOOR DIFFICULT TO OPEN AND CLOSE. LUBRICATED AFT LEFT LAVATORY DOOR TRACK DOOR OPERATES FREELY NOW. - [SDR AALA202409303182](https://openairdocs.org/sdr/AALA202409303182.md): Sign · detached · Sep 27, 2024 · N933NN · Boeing 737823 · Emergency Lighting > AIRCRAFT WAS NOT GROUNDED: EXIT SIGN ADJACENT TO FORWARD SERVICE DOOR IS DETACHED. MAINTENANCE REPLACED EXIT SIGN ASSY IAW AMM 33-51-01. - [SDR AALA202408197543](https://openairdocs.org/sdr/AALA202408197543.md): Door · open · Aug 18, 2024 · N933NN · Boeing 737823 · Accessory Compartment Doors > AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: LOUD KNOCKING NOISE HEARD FROM RIGHT SIDE OF COCKPIT AFTER TAKEOFF. LOUD ENOUGH TO BE HEARD FROM CABIN; AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT CLE. CONFIRMED GROUND POWER SERVICE DOOR FOUN - [SDR AALA202406270786](https://openairdocs.org/sdr/AALA202406270786.md): Fuel Filter · faulty · Jun 26, 2024 · N933NN · Boeing 737823 · Engine Fuel Distribution > AIRCRAFT WAS GROUNDED: AT APPROX 1500 FEET ON TAKEOFF, NUMBER 1 FILTER BYPASS LIGHT ILLUMINATED CREW REPORTS THAT THE BY-PASS WAS FUEL RELATEDED. REMOVED AND REPLACED NUMBER 1 ENGINE FUEL FILTER. PER AMM 73-11-02. - [SDR AALA202405221424](https://openairdocs.org/sdr/AALA202405221424.md): Girt Bar · out of tolerance · May 21, 2024 · N933NN · Boeing 737823 · Emergency Equipment > AIRCRAFT WAS NOT GROUNDED: FLIGHT ATTENDANT REPORT THAT THE FORWARD ENTRY DOOR GIRT BAR EXTREMELY DIFFICULT TO ARM. TOOK TWO FLIGHT ATTENDANTS TO ARM THE GIRT BAR. REMOVED SLIDE ASSEMBLY RESTORED GIRT BAR SKIRT AND REINSTALLED ASSEMBLY. FUNCATIONAL CHECK GOOD. - [SDR AALA202405157469](https://openairdocs.org/sdr/AALA202405157469.md): Slide · dislodged · May 14, 2024 · N933NN · Boeing 737823 · Escape Slide > AIRCRAFT WAS GROUNDED: L1 DOOR STUCK OPEN AND SLIDE FELL OUT. REMOVED AND REPLACED EMERGENCY SLIDE AT L1 DOOR. PER WORK CARD 08L22125001. - [SDR AALA202405086662](https://openairdocs.org/sdr/AALA202405086662.md): Sign · unsecure · May 7, 2024 · N933NN · Boeing 737823 · Emergency Lighting > AIRCRAFT WAS NOT GROUNDED: EMERGENCY EXIT SIGN BY ROW 16 FELL DOWN. REINSTALLED AND SECURED EMERGENCY EXIT SIGN AT ROW 16. PER AMM 25-63-00. - [SDR AALA202404173369](https://openairdocs.org/sdr/AALA202404173369.md): Door · lack of lube · Apr 15, 2024 · N933NN · Boeing 737823 · Fixed Inner Doors > AIRCRAFT WAS NOT GROUNDED: LEFT AFT LAVATORY DOOR DIFFICULT TO OPEN. LUBE LEFT AFT LAVATORY DOOR LOCK LATCH AND HINGE. FUNCATIONAL CHECK GOOD. **(CLOSED). - [SDR AALA202404163369](https://openairdocs.org/sdr/AALA202404163369.md): Door · lack of lube · Apr 15, 2024 · N933NN · Boeing 737823 · Fixed Inner Doors > AIRCRAFT WAS NOT GROUBNDED: LEFT AFT LAVATORY DOOR DIFFICULT TO OPEN. LUBE LEFT AFT LAVATORY DOOR LOCK LATCH AND HINGE. FUNCATIONAL CHECK GOOD. - [SDR AALA202404017698](https://openairdocs.org/sdr/AALA202404017698.md): Transmitter · leaking · Mar 30, 2024 · N933NN · Boeing 737823 · Hydraulic Quantity Indicator > AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: DECREASING HYDRAULIC QUANTITY FLIGHT, ATTENDDANT REPORTED SEEING FLUID LEAKING; AIRCRAFT DIVERTED TO AND LANDED SAFELY AT MIA. REMOVED AND REPLACED SYSYTEM "A" HYDRAULIC FLUID QUANTITY TRANSMITTER. P - [SDR AALA202402133127](https://openairdocs.org/sdr/AALA202402133127.md): Unknown · unknown · Feb 10, 2024 · N933NN · Boeing 737823 · Fixed Inner Doors > AIRCRAF WAS NOT GROUNDED: LEFT REAR (L4) LAVATORY ENTRY DOOR DIFFICULT TO OPEN.: FOUND NO FAULTS IN LOCK HANDLE BI-FOLD DOOR ON BOTH SIDES OF THE LOCK. PER CMM 25-40-64. - [SDR AALA202402123127](https://openairdocs.org/sdr/AALA202402123127.md): Door · binding · Feb 10, 2024 · N933NN · Boeing 737823 · Fixed Inner Doors > AIRCRAF WAS NOT GROUNDED: LEFT REAR (L4) LAVATORY ENTRY DOOR DIFFICULT TO OPEN. (OPEN). - [SDR AALA202401228970](https://openairdocs.org/sdr/AALA202401228970.md): Scuff Plate · lack of lube · Jan 21, 2024 · N933NN · Boeing 737823 · Fixed Inner Doors > AIRCRAFT WAS NOT GROUNDED: LAVATORY D DOOR IS VERY STICKY AND DIFFICULT TO OPERATE. DOOR LATCH ALSO DIFFICULT TO OPERATE. CLEANED AND LUBED LAVATORY D LOWER SILL SCUFF PLATE AREA. - [SDR AALA202312227374](https://openairdocs.org/sdr/AALA202312227374.md): Door · out of adjust · Dec 21, 2023 · N933NN · Boeing 737823 · Fixed Inner Doors > AIRCRAFT WAS NOT GROUNDED: AFT LEFT LAVATORY DOOR DIFFICULT TO OPERATE. REPLACED 3 MISSING SCREWS ON THE TOP DOOR TRIM AND ADJUSTED THE BOTTOM TRIM AS REQUIRES. - [SDR AALA202308045035](https://openairdocs.org/sdr/AALA202308045035.md): Shade · damaged · Aug 2, 2023 · N933NN · Boeing 737823 · Standard Practices/Structures > AIRCRAFT WAS NOT GROUNDED: DAMAGED WINDOW SHADE AT EMERGENCY EXIT DOOR 16F (SEAT). REMOVED AND REPLACED EMERGENCY EXIT DOOR WINDOW SHADE ASSEMBLY FOR SEAT 16F PER 737 AMM 25-21-12 - [SDR AALA202307218861](https://openairdocs.org/sdr/AALA202307218861.md): Shade · damaged · Jul 13, 2023 · N933NN · Boeing 737823 · Standard Practices/Structures > AIRCRAFT WAS NOT GROUNDED: 16F WINDOW SHADE CRUMPLED AND WILL NOT OPEN FULLY. **SUPPLEMENTAL REPORT FOR AALA20230717886: REPLACED WINDOW SHADE AT 16F PER M/M 25-21-12.** (CLOSED) - [SDR AALA202307178861](https://openairdocs.org/sdr/AALA202307178861.md): Unknown · unknown · Jul 13, 2023 · N933NN · Boeing 737823 · Doors > AIRCRAFT WAS NOT GROUNDED: 16F WINDOW SHADE CRUMPLED AND WILL NOT OPEN FULLY. **SUPPLEMENTAL REPORT WILL BE SUBMITTED.** (OPEN) - [SDR AALA202212212120](https://openairdocs.org/sdr/AALA202212212120.md): Battery Pack · inoperative · Dec 18, 2022 · N933NN · Boeing 7378 · Emergency Lighting > AIRCRAFT IN BASE MAINTENANCE: EMERGENCY LIGHTING BATTERY PACK POWER SUPPLY M1674 FAILS OPERATIONAL TEST. REPLACED POWER SUPPLY. - [SDR AALA202210271372](https://openairdocs.org/sdr/AALA202210271372.md): None · loose · Oct 26, 2022 · N933NN · Boeing 737 · Emergency Equipment > AIRCRAFT WAS NOT GROUNDED: GIRT BAR RETAINING CLIPS ON DOOR L1 ARE LOOSE. ADJUSTED GIRT BAR RETAINING CLIPS ON L1 DOOR PER AMM 25-66-00. - [SDR AALA202204263448](https://openairdocs.org/sdr/AALA202204263448.md): Track · sticking · Apr 25, 2022 · N933NN · Boeing 737 · Fixed Inner Doors > AIRCRAFT WAS NOT GROUNDED: FLIGHT ATTENDANT REPORTS THAT THE LEFT REAR LAVATORY DOOR IS DIFFICULT TO OPEN/CLOSE. CHECKED AND CLEANED AN LUBED DOOR TRACK OPERATIONS CHECKS GOOD PER 52-50-00. - [SDR AALA202201244650](https://openairdocs.org/sdr/AALA202201244650.md): Warning System · none · Jan 23, 2022 · N933NN · Boeing 737* · Central Warning > AIRCRAFT WAS NOT GROUNDED: REJECTED TAKEOFF AT APPROXIMATELY 30 KNOTS DUE TO TAKEOFF CONFIGURATION WARNING. RETURNED TO GATE. MAINTENANCE ACCOMPLISHED PSEU BITE TEST AND FOUND STAB TRIM NOT GREEN, INPUT FAULT. ACCOMPLISHED FIM 31-51-00-810-821 AND FAULT CLEARE - [SDR AALA202111155439](https://openairdocs.org/sdr/AALA202111155439.md): Girt Bar · loose · Nov 14, 2021 · N933NN · Boeing 737* · Emergency Equipment > AIRCRAFT WAS NOT GROUNDED: FWD SERVICE DOOR GIRT BAR LOOSE. ADJUSTED FWD SERVICE DOOR GIRT BAR IAW AMM 25-66-02, OPS CHECK GOOD. - [SDR AALA202108269816](https://openairdocs.org/sdr/AALA202108269816.md): Retainer · out of adjust · Aug 25, 2021 · N933NN · Boeing 737823 · Emergency Equipment > AIRCRAFT WAS NOT GROUNDED: STOWAGE CLIP ON 1L DOOR UNABLE TO SECURE GIRT BAR. ADJUSTED STOWAGE CLIP IAW AMM 25-66-01, OPS CHECK GOOD. - [SDR AALA202108167507](https://openairdocs.org/sdr/AALA202108167507.md): Light · unsecure · Aug 13, 2021 · N933NN · Boeing 737823 · Emergency Lighting > AIRCRAFT WAS NOT GROUNDED: ESCAPE PATH LIGHT ROW 22 LAYING ON FLOOR. RESECURED ESCAPE PATH LIGHT ROW 22 PER AMM 33-50-00. Next page: https://openairdocs.org/aircraft/N933NN/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 = 'N933NN' AND registry_match = 'registration' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/aircraft/N933NN/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.