# N523MC: 1979 Boeing 747-2D7B, registration cancelled 2018-02-14

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: February 14, 2018
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Boeing 747-2D7B](https://openairdocs.org/model/boeing-747-2d7b) (registry code 1384803)
- Engine: [GE CF6-50 series](https://openairdocs.org/engine/ge-cf6-50-series) (registry code 30018)
- Data sheets: [TCDS E23EA](https://openairdocs.org/tcds/E23EA) (OpenAirDocs)
- Serial number: 21782
- Year built: 1979
- Type of aircraft: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, normal
- Airworthiness date: June 23, 2004
- Certificate issued: May 16, 2012
- Last registry action: May 16, 2012
- Mode S code: A69529
- Owner when cancelled: [Commercial Aircraft Services Inc](https://openairdocs.org/faa-owner/COMMERCIAL%20AIRCRAFT%20SERVICES%20INC)
- Location: [Eagle, ID](https://openairdocs.org/faa-place/ID/Eagle)
- Owner type: Corporation
- Owner's area on the map: 43.7756° N, 116.3950° W: Placed by OpenAirDocs at the center of ZIP code 83616, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N523MC
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=523MC
- Page: https://openairdocs.org/deregistered/N523MC-2018-02-14

From the FAA registry file of October 31, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Boeing 747-2D7B: https://openairdocs.org/model/boeing-747-2d7b.md

## Service difficulty reports (193, newest 50)

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

- [SDR UIEA2011091300511](https://openairdocs.org/sdr/UIEA2011091300511), Sep 13, 2011: FRAME. CRACKED. BS 400, S23R FRAME CRACKED. CRACK AREA STOP DRILLED AND REPAIRED IAW HX RS R53-12-37208, REV A.
- [SDR UIEA2011091300508](https://openairdocs.org/sdr/UIEA2011091300508), Sep 13, 2011: REVEAL. CRACKED. BS 2231 S17L REVEAL PANEL CRACK APPRX 0.625" LONG. REVEAL PANEL CRACK REPAIR CARRIED OUT IAW HX RSNO 53-60-37210, REV A. WORK DETAILS REF TO NRC 51169.
- [SDR UIEA2011091300503](https://openairdocs.org/sdr/UIEA2011091300503), Sep 13, 2011: FRAME. CRACKED. BS 2598 BULKHEAD OUTER CHORD AREA WL 274, 1 FASTENER HOLE CRACKED AT FRAME SUPPORT FIG (LT BS 2598, BULKHEAD OUTER CHORD WL 274 CRACKED FASTENER HOLE REPAIRED I
- [SDR UIEA2011091300501](https://openairdocs.org/sdr/UIEA2011091300501), Sep 13, 2011: LIGHT. INOPERATIVE. ZONE A RT 1 EMERGENCY LIGHT FOUND INOPERATIVE. REPLACED AND LIGHT TESTED AND FOUND OK, REF AMM 33-51-07.
- [SDR UIEA2011091300500](https://openairdocs.org/sdr/UIEA2011091300500), Sep 13, 2011: FRAME. CRACKED. BS 1254 FRAME INNER CHORD FASTENER HOLE CRACK 0.040 IN LENGTH. CRACKED SEGMENT CUT OFF AND REPAIRED IAW HX RS R53-42-37204, REV A AND EO 4753B419, PART 1.
- [SDR UIEA2011091300499](https://openairdocs.org/sdr/UIEA2011091300499), Sep 13, 2011: LIGHT. INOPERATIVE. L5 DOOR 1EA EMERGENCY LIGHT FOUND INOP. L5 DOOR EMERGENCY LIGHT ASSY REPLACED, HOLD TEST OK MM 33-51-07.
- [SDR UIEA2011091300498](https://openairdocs.org/sdr/UIEA2011091300498), Sep 13, 2011: FRAME. CRACKED. FRAME BS 2231 BETWEEN S24-25L, 1 EA FASTENER HOLE CRACK APPROX 0.040 LONG AT FRAME STRAP. REPAIRED IAW HX RS R53-62-27215, REV A. REPAIR WORK DETAILS REF TO NRC
- [SDR UIEA2011091300497](https://openairdocs.org/sdr/UIEA2011091300497), Sep 13, 2011: REVEAL. CRACKED. BS 2231, BETWEEN S21-22L FOUND 2 EA FASTENER HOLES CRACK AT REVEAL PANEL. CRACKED AREA STOP HOLE DRILLED AND REPAIR CARRIED OUT IAW HX RS R53-62-37215, REV A.
- [SDR UIEA2011091300496](https://openairdocs.org/sdr/UIEA2011091300496), Sep 13, 2011: FRAME. CRACKED. BS 2231, S26R FRAME AFT INNER CHORD CRACK APPROX 1" LONG ON VERT FLANGE. CRACKED AREA TRIMMED OFF AND REPARIED IAW HX RS R53-62-37218, REV A.
- [SDR UIEA2011091300495](https://openairdocs.org/sdr/UIEA2011091300495), Sep 13, 2011: FRAME. CRACKED. BS 2231, S26R, FRAME WEB CRACK APPROX 1" LONG ON FWD INNER CHORD VERT FLANGE. CRACK AREA TRIMMER OFF AND REPAIRED IAW HX RS R53-62=37218, REV A AND WORK DETAILS
- [SDR UIEA2011090900487](https://openairdocs.org/sdr/UIEA2011090900487), Sep 9, 2011: SKIN. CRACKED. INSPECTION DETECTED 2 CRACKS (APPROX 0.030" LONG) ON THE SKIN AT RT BS 980, S38R. REPAIRED IAW SRM 53-30-03, FIG 60.
- [SDR UIEA2011090900486](https://openairdocs.org/sdr/UIEA2011090900486), Sep 9, 2011: SPAR. DAMAGED. CRACK DAMAGE WAS DETECTED AND RAN FORWARD TO AFT AND WAS APPROX 4.5 INCHES LONG. WEB WAS CUT AT APPROX NAC STA 286 AND THE SECTION OF THE WEB FROM NAC STA 286.0
- [SDR UIEA2011090900490](https://openairdocs.org/sdr/UIEA2011090900490), Sep 1, 2011: CHANNEL. CRACKED. DURING INSPECTION IAW EO 4753B328, A FASTENER HOLE CRACK WAS FOUND AT TENSION TIE FWD CHANNEL AT BS 920 LT. CRACK LENGTH WAS 0.125" AND RUNNING OTBD AT 6 O'CLOC
- [SDR UIEA2011091300510](https://openairdocs.org/sdr/UIEA2011091300510), Aug 31, 2011: FRAME. CRACKED. LT BS 1265 FRAME WEB CRACKED AT FASTENER HOLE. CRACKED AREA TRIMMED OFF AND REPAIRED IAW HX RS R53-42--37204, REV A AND EO 4753B419, PART 1.
- [SDR UIEA2011090900482](https://openairdocs.org/sdr/UIEA2011090900482), Aug 31, 2011: RIB. DAMAGED. DURING THE PRESENT C4 CHECK, NR 2 PYLON LT NAC STA 332 FRAME RIB WAS FOUND WITH A WEAR AROUND MOUNT BOLT HOLE, APPROX 0.035 INCH MATERIAL REMOVED. THE ORIGINAL 
- [SDR UIEA2011091300504](https://openairdocs.org/sdr/UIEA2011091300504), Aug 30, 2011: REVEAL. CRACKED. REVEAL PANEL BS 2231 BETWEEN S24-25L CRACKED APPROX 0.500: LONG. CRACKED AREA TRIMMED OFF AND REPAIRED IAW HXRS R53-62-37215, REV A.
- [SDR UIEA2011091300509](https://openairdocs.org/sdr/UIEA2011091300509), Aug 30, 2011: FRAME. CRACKED. FRAME BS 2231 BETWEEN S16-17L, FASTENER HOLE CRACK APPROX 0.040 AT FRAME STRAP. CRACKED SEGMENT CUT OFF AND REPAIRED IAW HX RS R53-60-37210, REV A. )
- [SDR UIEA2011090200479](https://openairdocs.org/sdr/UIEA2011090200479), Aug 30, 2011: FAIRING. BROKEN. ENGINE EXHAUST -NR 2 ENGINE RT UPPER INNER FAIRING REPLACEMENT - DURING THE CURRENT C-CHECK, THE UPPER INNER FAIRING WAS FOUND BROKEN (PARTIAL MISSING) AT FWD S
- [SDR UIEA2011091300507](https://openairdocs.org/sdr/UIEA2011091300507), Aug 29, 2011: FRAME. CRACKED. FRAME BS 2231 BETWEEN S24-25L, 1 FASTENER HOLE CRACK AT FRAME AFT INNER CHORD APPROX 0.040: LONG. CRACK AREA TRIMMED OFF AND REPAIR CARRIED OUT IAW HVRX R53-62-
- [SDR UIEA2011091300506](https://openairdocs.org/sdr/UIEA2011091300506), Aug 29, 2011: FRAME. CRACKED. BS 2231 S26L FRAME AFT INNER CHORD CRACK APPROX .5" LONG AT VENT FLANGE. CRACK AREA TRIMMED OFF AND REPAIRED IAW HXRSNC-R53--62-37206 REV A.
- [SDR UIEA2011091300505](https://openairdocs.org/sdr/UIEA2011091300505), Aug 29, 2011: FRAME. CRACKED. BS 2231 FRAME S26R FWD INNER CHORD CRACK APPROX 0.025" LONG ON VENT HANG. CRACK TRIMMED OFF AND REPAIRED IAW HXRS 53-62-47218, REV A.
- [SDR UIEA2011090900488](https://openairdocs.org/sdr/UIEA2011090900488), Aug 26, 2011: FRAME. CRACKED. DURING C4 CHECK, DETECTED A CRACK ON THE RT SIDE, BS 360 FRAME THE CRACK IS LOCATED ON THE WEB LAYER ONLY AND IS APPROX 1 INCH LONG RUNNING OTBD AND DOWNWARDS. 
- [SDR UIEA2011082600468](https://openairdocs.org/sdr/UIEA2011082600468), Aug 26, 2011: SEAT TRACK. CORRODED. BS 550-560, RBL 46 SEAT TRACK CORRODED.
- [SDR UIEA2011091300502](https://openairdocs.org/sdr/UIEA2011091300502), Aug 25, 2011: SKIN. DAMAGED. EXTERNAL POWER RECEPTACLES ACCESS DOOR CUTOUT FOUND DAMAGED. CRACK TRIMMED OFF AND REPAIRED IAW HX RS R53-11-27121, REV A.
- [SDR UIEA2011082500470](https://openairdocs.org/sdr/UIEA2011082500470), Aug 25, 2011: STRINGER. CRACKED. BS 988, STRINGER 16L CRACKED.
- [SDR UIEA2011090900480](https://openairdocs.org/sdr/UIEA2011090900480), Aug 24, 2011: FRAME. CRACKED. DISCOVERED A CRACK IN THE FRAME AT BS 360 AND S16R. REPAIR IS CLASSIFIED AS A CATAGORY B PERMANENT REPAIR WITH REPEAT INSPECTION REQUIREMENTS IAW SB 747-53A2265
- [SDR UIEA2011082400466](https://openairdocs.org/sdr/UIEA2011082400466), Aug 24, 2011: FRAME. CRACKED. BS 820, S6R FRAME CRACKED, REPAIR ACCOMPLISHED DURING A C4 CHECK ON NRC 505315 IAW SRM 53-10-04, FIGURE 54.
- [SDR UIEA2011082400465](https://openairdocs.org/sdr/UIEA2011082400465), Aug 24, 2011: FRAME. CRACKED. BS820, S6L FRAME CRACKED, REPAIR ACCOMPLISHED DURING A C4 CHECK ON NRC 505323 IAW SRM 53-10-04, FIGURE 54.
- [SDR UIEA2011090900481](https://openairdocs.org/sdr/UIEA2011090900481), Aug 22, 2011: FRAME. CRACKED. DURING C4 CHECK, WHILE COMPLYING WITH SB 747-53A2265, REV 9, FOUND CRACK DAMAGE TO FRAME. DAMAGE WAS REPAIRED IAW SRM 53-10-04 FIG 11.
- [SDR UIEA2011082200462](https://openairdocs.org/sdr/UIEA2011082200462), Aug 22, 2011: FRAME. CRACKED. BS 580, S24L FRAME CRACKED, REPAIRED IAW SRM 53-10-04, FIG 35.
- [SDR UIEA2011082200460](https://openairdocs.org/sdr/UIEA2011082200460), Aug 22, 2011: FRAME. CRACKED. FUSELAGE - BS540, S24L-S25L FRAME CRACK - REPAIR (THIS EO DOCUMENTS A REPAIR ACCOMPLISHED DURING A C4 CHECK OF THE DATUM ACFT ON NRC 502668 IAW SRM 53-10-04, FI
- [SDR UIEA2011082200459](https://openairdocs.org/sdr/UIEA2011082200459), Aug 22, 2011: FRAME. CRACKED. BS 560, S24-S25L FRAME CRACKED. REPAIRED IAW SRM 53-10-04, FIG 35.
- [SDR UIEA2011091300494](https://openairdocs.org/sdr/UIEA2011091300494), Aug 21, 2011: CHANNEL. CRACKED. RIGHT BS 840 FRAME TO TENSION TIE ATTACHMENT AREA FOUND 1 EA FASTENER HOLE CRACKED AT FWD CHANNEL CRACK APPROX .1250" IN LENGTH. REPAIR CARRIED OUT IAW HX RS NR
- [SDR UIEA2011090900485](https://openairdocs.org/sdr/UIEA2011090900485), Aug 18, 2011: FLOORBEAM. PUNCTURED. DURING ROUTINE INSPECTIONS A 1.0 INCH X 0.5 INCH PUNCTURE WAS FOUND IN THE SUBJECT FLOORBEAM WEB AT BS 280, WL 200. THE PUNCTURE WAS REPAIRED BY ACCOMPLISHING A
- [SDR UIEA2011090900484](https://openairdocs.org/sdr/UIEA2011090900484), Aug 17, 2011: FRAME. CRACKED. DURING C4 CHECK. ACCOMPLISHMENT OF SB 747- 53A2416, REV 2 INSPECTIONS (2) 0.040" CRACKS WERE FOUND IN FRAME . 2 ADDITIONAL 0.50" CRACKS WERE FOUND IN THE WEB. R
- [SDR UIEA2011073100400](https://openairdocs.org/sdr/UIEA2011073100400), Jul 31, 2011: FUEL FILTER. FAILED. DURING CRUISE, NR 2 ENG ROLLED BACK TO IDLE. NO RESPONSE TO THROTTLE MOVEMENTS. APPROX 5 SEC LATER OIL PRESS DROPPED TO ZERO QTY OK. TROUBLESHOT IAW MM FIM 71-0
- [SDR UIEA2011073100388](https://openairdocs.org/sdr/UIEA2011073100388), Jul 31, 2011: STRUCTURE. CRACKED. DURING WALK AROUND CHECK, MX FOUND 2EA CRACKS AT 7 O'CLOCK POSITION ON THE AFT CENTER BODY ON THE NR 2 ENGINE. 1EA CRACK MEASURING 1.25 INCHES AND 1EA CRACK MEA
- [SDR UIEA2011060800288](https://openairdocs.org/sdr/UIEA2011060800288), Jun 8, 2011: LIGHT. UNKNOWN. 1ST OBSERVER'S SEAT MAP LIGHT. TRANSFERRED & NBSP; TO MDDR 24530. CAT C MEL NR 33-1.
- [SDR UIEA2011053000268](https://openairdocs.org/sdr/UIEA2011053000268), May 30, 2011: SLEEVE. DAMAGED. DURING WALK AROUND CHECK, MX FOUND A HOLE 0.5" WIDE ON THE OUTER SLEEVE OF THE LONG FIXED CORE EXHAUST NOZZLE (LFCEN) ON THE NR 2 ENGINE. THE HOLE IS 6.0" FROM 
- [SDR UIEA2011041800313](https://openairdocs.org/sdr/UIEA2011041800313), Apr 18, 2011: BULB. INOPERATIVE. M/D DOOR SILL AFT EMERGENCY LIGHT FOUND INOPERATIVE. BULB REPLACED AND CHECK 'OK' REF AMM 33-51-00.
- [SDR UIEA2011040800244](https://openairdocs.org/sdr/UIEA2011040800244), Apr 8, 2011: DOOR. DENTED. DURING MX WALKAROUND, MX FOUND DENT ON THE NR 1 ENGINE OIL SERVICE DOOR. MX ACCOMPLISHED PART 2, EO 1971A027, AND INSTALLED A BLANKING PLATE. EO 1971A027 ALLOWS
- [SDR UIEA2011032800159](https://openairdocs.org/sdr/UIEA2011032800159), Mar 28, 2011: UNKNOWN. UNKNOWN. TAKEOFF REJECTED AT 90 KNOTS, WHEN YAW TO THE LT WAS FELT. INSPECTED NR 1 AND NR 2 ENGINES, NO DEFECTS NOTED, PERFORMED HIGH ENERGY STOP INSP, NO DEFECTS NOTED.
- [SDR UIEA2011032200155](https://openairdocs.org/sdr/UIEA2011032200155), Mar 22, 2011: ACCUMULATOR. LEAKING. CREW REPORTED HYD LEAK ON THE NR 4 SYS (FOUND BRAKE ACCUMULATOR LEAKING. R & R ACCUMULATOR, SERVICED SYSTEM, PERFORMED OPERATIONAL AND LEAK CHECKS, ALL; OK.)
- [SDR UIEA2011020500092](https://openairdocs.org/sdr/UIEA2011020500092), Feb 5, 2011: DUCT. DAMAGED. ENGINE NR 2 OUTBOARD T/R HALF HI BYPASS "C" DUCT INTERNAL WALL WITH DELAMINATION AND MISSING SKIN MATERIAL(REMOVED SECTION OF DAMAGED SKIN AND PREPARED AREA FAB
- [SDR UIEA2011020500046](https://openairdocs.org/sdr/UIEA2011020500046), Feb 5, 2011: SKIN. DAMAGED. MAJOR REPAIR. DURING A-CHECK BEING PERFORMED, MX FOUND THE LT WING ILES 718.80; UPPER L/E PANEL - EXTERNAL SKIN WITH CRACK/DELAMINATION DAMAGE , MEASURING 24.0 
- [SDR UIEA2010082600147](https://openairdocs.org/sdr/UIEA2010082600147), Aug 26, 2010: MOUNT. DAMAGED. THE PURPOSE OF EO 4725A284  IS TO DOCUMENT A MAJOR REPAIR. DURING WALKAROUND INSP, MX FOUND THE ELECTRICAL CONDUIT AND CONNECTOR MOUNT HSG AT THE NLG DAMAG
- [SDR UIEA2010080900148](https://openairdocs.org/sdr/UIEA2010080900148), Aug 9, 2010: ACTUATOR. BROKEN. BODY GEAR UNLOCKED LIGHT ILLUMINATED IN BOTH PRIMARY AND ALTERNATE POSITIONS WHEN LINED UP FOR TAKEOFF (FOUND RT BODY GEAR STEERING ACTUATOR BROKEN. R & R BODY 
- [SDR UIEA2010080500132](https://openairdocs.org/sdr/UIEA2010080500132), Aug 5, 2010: SKIN. DAMAGED. DURING WALKAROUND INSP, MX FOUND DAMAGE TO THE NR 2 ENG INLET COWL OUTER BARREL SKIN CRACK/DAMAGE (REF FIG 1). (DISPOSITION WAS MADE TO PERFORM A TIME LIMITED R
- [SDR UIEA2010072700119](https://openairdocs.org/sdr/UIEA2010072700119), Jul 27, 2010: A/C PACK. INOPERATIVE. ATB, ELECTRICAL SMOKE SMELL IN COCKPIT. RAN ELECTRICAL SMOKE CHECKLIST, WHEN STEP 6 ACCOMPLISHED, SMOKE DISSIPATED (IAW VERBAL CREW COMMENT, DURING CLIMB, WITH 
- [SDR UIEA2010070600092](https://openairdocs.org/sdr/UIEA2010070600092), Jul 6, 2010: FLOOR SUPPORT. CRACKED. DURING C-CHECK, A SUPPORT LOCATED COMMON TO THE AFT CARGO FLOOR FROM BS 1900 TO BS 1920 FROM RBL 17- RBL 23 WAS BENT AND HAD 2 ELONGATED HOLES. (THE DAMAGE WAS 

All 193: https://openairdocs.org/deregistered/N523MC-2018-02-14/reports.md

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB DCA05WA020](https://openairdocs.org/ntsb/DCA05WA020), Dec 12, 2004: Boeing 747 (N523MC), London, United Kingdom, incident, no damage

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