# Boeing 727-21C

- Type: Aircraft model (FAA registry)
- Registry code: 138400M
- Manufacturer (registry): BOEING
- Model: 727-21C
- Aircraft type: Fixed wing multi engine
- Category: Airplane
- Engines: 3 · Turbo-jet
- Seats: 134
- Weight class: 20,000 lb and over
- Cruise speed: 435 mph
- Certification: Type certificated
- Registered aircraft: 0
- Page: https://openairdocs.org/model/boeing-727-21c

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker.

## ADs that may apply (OpenAirDocs)

Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

None matched.

## Registered aircraft

None registered with this model now.

## NTSB investigations

None matched to aircraft with this model.

## FAA accident and incident reports (2)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Incident 19990506016019I](https://openairdocs.org/incident/19990506016019I), May 6, 1999: Boeing 72721C (N705A), Minneapolis, MN. Eng. #3 strut overheat occurred in climb, complied with ck list. Eng. #3 fire warning light came on, complied with ck list, shut down eng. #3 & fired…
- [Incident 19951006036959I](https://openairdocs.org/incident/19951006036959I), Oct 6, 1995: Boeing 72721C (N934UP), Syracuse, NY. Narrative: on Friday, October 6, 1995, at 6:50 EDT, a Boeing 727, N934UP, experienced low hydraulic oil quantity on the "a" system at level flight 270 cruise.…

## Service difficulty reports (217, newest 50)

As reported by operators and repair stations, by the model named in the report.

- [SDR UPS03240694](https://openairdocs.org/sdr/UPS03240694), May 14, 2003: LIGHT. INTERMITTENT. MAIN ENTRY DOOR EMERG LT INTERMITTENT. R/R LT ASSY & BATTERIES. OPS CK OK IAW MM 33-50-67. LT ASSY P/N ON/OFF 10-0067-9/10-0067-7. S/N ON/OFF S106/7432.
- [SDR UPS03240693](https://openairdocs.org/sdr/UPS03240693), May 14, 2003: BATTERY. INOPERATIVE. COCKPIT DOOR EMERG LT INOPERATIVE. R/R BATTERIES P/N S106. IAW MM 3307. OPS CK OKAY.
- [SDR UPS03240053](https://openairdocs.org/sdr/UPS03240053), Jan 14, 2003: PANEL. CRACKED. INSPECTION TYPE: C, SUSPECT CRACK IN NLG WHEEL WELL STA 245 LT SIDE PANEL. REPAIR CARRIED OUT IAW SRM 51-40-2.
- [SDR UPS03240055](https://openairdocs.org/sdr/UPS03240055), Jan 10, 2003: SPAR. CRACKED. INSPECTION TYPE: C, DURING REPLACEMENT OF RT O/B RIB FOR ELEVATOR STA 209.5 LWR REAR SPAR FOUND TO BE CRACKED BETWEEN TWO FASTENERS AT O/B EDGE OF SPAR. REPAIRE
- [SDR UPS03240050](https://openairdocs.org/sdr/UPS03240050), Jan 8, 2003: BRACKET. CRACKED. INSPECTION TYPE:C ON REMOVAL OF L/H ELEVATOR PCU BRACKET ON FRONT SPAR OF ELEVATOR FOU ND TO BE CRACKED POSITION SENSOR BRACKET ON L/H ELEV. FRONT SPAR REPLACED
- [SDR UPS03240057](https://openairdocs.org/sdr/UPS03240057), Jan 7, 2003: DOOR. CRACKED. INSPECTION TYPE:C WING LANDING GEAR DOOR R/H SIDE CRACK FOUND ON INSIDE OF DOOR REAR S PAR OF DOOR 19TH UP FROM BOTTOM OF DOOR CRACK IS ALONG BETWEEN 2 RIV ET H
- [SDR UPS03240056](https://openairdocs.org/sdr/UPS03240056), Jan 7, 2003: FITTING. CRACKED. INSPECTION TYPE: C, CRACK INDICATION IN ONE HOLE BS 870 LT HOLE LOCATED 2ND FASTENER ROW FROM FWD EDGE OF FITTING TOP FASTENER HOLE OF LWR FITTING. REPAIRED IAW
- [SDR UPS03240049](https://openairdocs.org/sdr/UPS03240049), Jan 7, 2003: BRACKET. BROKEN. INSPECTION TYPE:C FLAT BRACKET BROKEN ON FUSELAGE SKIN AT BS 740 AT INTERSECTION WITH STR. 17R NEW PLATE FABRICATED IAW SRM 51-20-01 FIG 7 INSTALLED IAW SRM 51-
- [SDR UPS03240066](https://openairdocs.org/sdr/UPS03240066), Jan 6, 2003: ELEVATOR. CRACKED. INSPECTION TYPE:C SUSPECT CRACK ON LH ELEVATOR REAR SPAR @ 2 ND HINGE FROM O/B @ TOP I /B CORNER DUE TO UNAVAILABILITY OF REAR SPAR REPLACEMENT KIT. REPLACED L/
- [SDR UPS03240065](https://openairdocs.org/sdr/UPS03240065), Jan 6, 2003: FITTING. CRACKED. INSPECTION TYPE:C CRACK INDICATION IN 2 HOLES BS 950 L/H HOLES LOCATED ON ROWS 2ND FRO M FWD EDGE OF FITTING AND 2ND HOLES FROM BOTTOM OF SPLICE PLATE JUST BELO
- [SDR UPS03240048](https://openairdocs.org/sdr/UPS03240048), Jan 6, 2003: SKIN. CORRODED. INSPECTION TYPE: C, POPPED RIVET HEAD AT BS 1180 STR 7L DUE TO CORROSION. ALSO FURTHER SIGNS OF CORROSION ON STR 7L BETWEEN 1180 & 1150. LFEC INSP PERFORMED AT 
- [SDR UPS03240064](https://openairdocs.org/sdr/UPS03240064), Jan 4, 2003: FRAME. CRACKED. INSPECTION TYPE: C, SUSPECT CRACK ON LT HORIZONTAL STAB UPPER FRAME JUST I/B OF ELEVATOR RIB STA 173.21. REPAIR CARRIED OUT IAW SMRO EO 2003-001-004 UPS ENGINEE
- [SDR 02FDEA00315](https://openairdocs.org/sdr/02FDEA00315), May 7, 2002: WIRE. DAMAGED. DURING TAXI ELEVATOR FEEL DIFFERENTIAL LIGHT CAME ON. LOW PRESS LIGHT C/B ON. HYD A & B FILTERS CHECK GOOD. PITOT TUBES ON TAIL WERE CLEAN. SPLICED IN NEW SECTI
- [SDR 02FDEA00215](https://openairdocs.org/sdr/02FDEA00215), Mar 23, 2002: LAMP. FAILED. 02-79 LEFT GEAR DOWN LIGHT INOP. RELAMPED GEAR INDICATOR. OK FOR SERVICE.
- [SDR UPS01236766](https://openairdocs.org/sdr/UPS01236766), Aug 30, 2001: LIGHT. DEFECTIVE. INSPECTION TYPE:PFLT EXIT LIGHTS STAY ON IN ARMED POSITION. REPLACED LIGHT ASSEMBLY
- [SDR UPS01236257](https://openairdocs.org/sdr/UPS01236257), Jun 28, 2001: FRAME. CRACKED. INSPECTION TYPE:C CRACK INDICATION AT FRAME, FUSELAGE BS913.5 RIGHT SIDE. CRACK CONFIRMED BY NDT INSP. PART 6 51-00-00 STOP DRILL CRACK AT FRAME AT BS 913.5 B72
- [SDR UPS01236261](https://openairdocs.org/sdr/UPS01236261), Jun 20, 2001: BULKHEAD. CRACKED. INSPECTION TYPE:C, RT WHEEL WELL FWD LOWER FRAME SHOWS CRACK DAMAGE AT BS 870 RBL 4.5. REMOVED FASTENERS AT DAMAGED AREA SRM 51-30-2, CUTOUT WEB DAMAGED AREA AP
- [SDR UPS01236260](https://openairdocs.org/sdr/UPS01236260), Jun 20, 2001: BULKHEAD. CRACKED. INSPECTION TYPE:C RIGHT WHEEL WELL STA 870 BULKHEAD CRACK AT APU VALVE CUT OUT RBL4.5 STOP DRILL CRACK ON RH W/W STA 870 AT APU VALVE CUT OUT RBL45 STOP DRILL 1
- [SDR UPS01236259](https://openairdocs.org/sdr/UPS01236259), Jun 20, 2001: FRAME. CRACKED. INSPECTION TYPE:C, LEFT WW FRAME 930 HAS PREVIOUS REPAIR WITH STOP HOLE, BUT IS CONTINUING UPWARDS AFTER STOP HOLE FRAME BELOW FLOOR BS 930. PERFORMED HFEC INSP
- [SDR UPS01236258](https://openairdocs.org/sdr/UPS01236258), Jun 20, 2001: WEB. CRACKED. INSPECTION TYPE:C NOSE LANDING GEAR BAY RH SIDE WALL AT BS 266 HAS A CRACK INDICATION. REMOVED ACCESS PANEL #3125 AS PER SRMB727-51-30-2 CUT OUT DAMAGE AREA AS 
- [SDR UPS01236256](https://openairdocs.org/sdr/UPS01236256), Jun 20, 2001: WEB. CRACKED. INSPECTION TYPE:C NOSE LANDING GEAR BAY LH SIDE AT BS 259 SIDE WALL HAS A CRACK INICATION. REMOVED ACCESS PANEL #3124 AND LOWER WEB TO GAIN ACCESS TO DAMAGE ARE
- [SDR UPS00234570](https://openairdocs.org/sdr/UPS00234570), Dec 27, 2000: LANDING GEAR. FAULTY. INSPECTION TYPE:N/A NOSE GEAR DID NOT EXTEND ON FIRST TRY. RECYCLED & NOSEGEAR EXTENDED. JACKED AIRCRAFT, HEATED NOSE WHEEL AREA TO REMOVE ICE. GREASED TRUNI ON
- [SDR 00FDEA00462](https://openairdocs.org/sdr/00FDEA00462), Jul 18, 2000: CONNECTOR. LOOSE. AFT TAKEOFF WHEN GEAR RETRACTED (GEAR HANDLE UP) RED DOOR LIGHT & 2ND OFF. PNL RIGHT MG DOOR ANNUNCIATOR LIGHT REMAIN ON. FOUND CANNON PLUG FOR RG DOOR SWITCH B
- [SDR 00FDEA00452](https://openairdocs.org/sdr/00FDEA00452), Jul 14, 2000: INDICATOR. INOPERATIVE. UNSAFE NOSE GEAR IND, CYCLED GEAR STILL HAD UNSAFE NOSE GEAR. RELAMPED BOTH BULBS IN IND ON DOWNWIND, GOT SAFE IND. *S/D* PERFORMED OPER CK NOSE GEAR POS IND PE
- [SDR TC8A00011](https://openairdocs.org/sdr/TC8A00011), Jun 28, 2000: ENGINE. FAILED. #1 ENGINE FAILED. RETURNED TO TOL.
- [SDR TC8A00010](https://openairdocs.org/sdr/TC8A00010), Jun 20, 2000: PUMP. FAILED. ON TAXI, LEFT AFT BOOST PUMP POPPED CB, COULD NOT RESET. TRANSFERRED TO DMI LIST DMI NR 0090 IAW MEL 28-4 COMPLIED WITH SP 28-1 PAR H, PLACARDS INSTALLED.
- [SDR TC8A00009](https://openairdocs.org/sdr/TC8A00009), Jun 17, 2000: START VALVE. CLOSED. NR 2 START VALVE CLOSED BEFORE LIGHT OFF RETURNED TO RAMP. PERFORMED MANUAL START PROCEDURES ON NR 2 FIGURE, OPS CHECK NORMAL IAW FLIGHT MANUAL PG 3 NR 34.
- [SDR 00FDEA00391](https://openairdocs.org/sdr/00FDEA00391), Jun 16, 2000: DOOR. NOT CLOSED. AIRFRAME VIBRATION AND HUMMING SOUND. INSP GROUND PWR SERVICE DOOR. NO DEFECTS NOTED. RESECURED DOOR CLOSED.
- [SDR TC8A00005](https://openairdocs.org/sdr/TC8A00005), Apr 19, 2000: INDICATOR. INACCURATE. CAPT''S ATTITUDE INDICATOR SHOWS 5 DEGREES BANK.
- [SDR TC800005](https://openairdocs.org/sdr/TC800005), Apr 19, 2000: INDICATOR. INACCURATE. CAPT''S ATTITUDE INDICATOR SHOWS 5 DEGREES BANK.
- [SDR 00FDEA00273](https://openairdocs.org/sdr/00FDEA00273), Apr 19, 2000: HANDLE. WORN. ON FINAL APPROACH, GEAR HANDLE DOWN, HEARD NOISE. FELT MUSHY. NOSE GEAR AND NOSE DOORS UNSAFE RED LIGHT ON RECYCLED GOT GOOD IND ON ALL 3 GEAR. LANDING GEAR CON
- [SDR TC8A00004](https://openairdocs.org/sdr/TC8A00004), Apr 5, 2000: HYDRAULIC SYSTEM. LOW. DURING TAXI, SYS A-HYD FLUCTUATION IN INDIC. SERVICED A-HYD SYS, OPS CHECK GOOD IAW B727 MM 12-12-0.
- [SDR UPS00232190](https://openairdocs.org/sdr/UPS00232190), Apr 3, 2000: LINE. CRACKED. AIR TURN BACK ON DELIVERY FLIGHT FROM C CHECK AT SNN . CREW EXPERIENCED TOTAL LOSS OF B SYSTEM HYD PRESS . PRESS LINE FROM NR 1 B PUMP TO B SYS PRESS MODULE FOU
- [SDR UPS00232144](https://openairdocs.org/sdr/UPS00232144), Mar 21, 2000: SUPPORT BRACKET. CRACKED. INSPECTION TYPE: C, ENGINE NR 1 THRUST REVERSER O/B FAIRING MID SUPPORT BRACKET CRACKED. BRACKET REPLACED AS PER MM 78-30-00
- [SDR UPS00232142](https://openairdocs.org/sdr/UPS00232142), Mar 20, 2000: SUPPORT BRACKET. CRACKED. INSPECTION TYPE: C, LT WING, FIXED TE SUPPORT BRACKET CRACKED, AREA BELOW 37 SPOILER I/B HINGE. REPLACED BRACKET IAW SRM 51-30-02
- [SDR TC8A00003](https://openairdocs.org/sdr/TC8A00003), Mar 2, 2000: OUTFLOW VALVE. LEAKING. UNABLE TO MAINTAIN CABIN PRESSURE WITH ONE PACK VALVE OPERATING. REMOVED AND REPLACED LT OUTFLOW VALVE IAW B727 21-30-51, OPS CHECK AND LEAK CHECK NORMAL. REMOV
- [SDR TC8A00001](https://openairdocs.org/sdr/TC8A00001), Jan 21, 2000: BULB. INOPERATIVE. OUTBOARD LANDING LIGHT ON RT WING INOP. REMOVED AND REPLACED BULB, OPS CHECK GOOD IAW B727 MM 33-42-0.
- [SDR TC8A99027](https://openairdocs.org/sdr/TC8A99027), Nov 5, 1999: WIRE. FAILED. ON TAXI OUT, FLAGS APPEARED ON NR 2 AND NR 2 CDI. REPAIRED WIRE AT NR 2 DG AND SECURED WIRING HARNESS. NR 2 DG, RMI AND CD, OPS CHECK NORMAL IAW B727 MM 34-21-0
- [SDR TC8A99026](https://openairdocs.org/sdr/TC8A99026), Oct 6, 1999: NAV RECEIVER. FAILED. DURING TAXI-OUT, CAPT'S VOR FLAG IN VIEW. REMOVED AND REPLACED NR 1 VHF NAV RCVR AND SYSTEM OPS GOOD IAW BMM 34-31-0.
- [SDR TC8A99025](https://openairdocs.org/sdr/TC8A99025), Sep 18, 1999: CONNECTOR. WET. NR 2 B-PUMP C/B WILL NOT RESET. BMM 29-12-0, OPERATION OF B-PUMP. EXCESSIVE MOISTURE ON PUMP CONNECTION.
- [SDR TC8A99024](https://openairdocs.org/sdr/TC8A99024), Aug 13, 1999: PITOT  TUBE. OBSTRUCTED. AT 80 KTS ON FIRST OFFICER AIRSPEED INDICATOR 0 KTS ON CAPTAINS AIRSPEED INDICATOR, ABORT TAKEOFF. PERFORMED PITOT STATIC LEAK TEST. FOUND OBSTRUCTION IN CAPTS 
- [SDR TC8A99023](https://openairdocs.org/sdr/TC8A99023), Aug 7, 1999: PITOT TUBE. OBSTRUCTED. ON TAKEOFF ROLL, CAPT AIRSPEED ALIVE BY 70 KNTS, FIRST OFFICER 0 KTS. ABORT AT 78 KTS IN ACCORDANCE WITH TRANSCONTINENTAL PROCEDURE. NORMAL TAXI IN. REMOVED PIT
- [SDR TC8A99022](https://openairdocs.org/sdr/TC8A99022), Aug 7, 1999: UNION. FAILED. AFTER TAKEOFF, CAPT AND FIRST OFFICER AIRSPEED INDICATOR DIFFERENCE OF 50 KTS (FIFTY KNOTS). RETURN TO FIELD. INSPECTED F/O'S PITOT SYSTEM, REMOVED AND REPLACED
- [SDR 99FDEA00268](https://openairdocs.org/sdr/99FDEA00268), Jul 21, 1999: WARNING SWITCH. INOP. ON DEPART, RT MLG DOOR APPEAR TO REMAIN OPEN EVEN AFTER CYCLING MLG PER RED TAB PROC. REMOVED AND REPLACED RT GEAR DOOR WARN SWITCH PER MM 32-62-011-4 ADJ & TES
- [SDR TC8A99021](https://openairdocs.org/sdr/TC8A99021), Jul 13, 1999: GENERATOR. MALFUNCTIONED. UNABLE TO PARALLEL NR 2 GENERATOR. TRANSFERRED TO DMI 9233 AS PER TCA B727 MEL 24-1, SPECIAL PROCEDURES 24-1 PLACARDS INSTALLED.
- [SDR 99FDEA00179](https://openairdocs.org/sdr/99FDEA00179), May 14, 1999: HOSE. LEAKS. 99-113 - LWR AFT BODY O/H LIGHT ILLUM. LIGHT WENT OUT AFTER CLOSE NR 1 BLD AND BEFORE TURN OFF NR 1 PACK. 3RD TIME WRITTEN UP. REMOVED AND REPLACED SENSE LINE. 
- [SDR 99FDEA00178](https://openairdocs.org/sdr/99FDEA00178), May 13, 1999: OVERHEAT LOOP. INOPERATIVE. 99-112 - LWR AFT BODY LIGHT ILLUM. LIGHT EXTINGUISH WHEN RT PACK AND RT BLD TURN OFF. REMOVED AND REPLACED LOOP PER MM 26-14-001-4. OPER CK NORM.
- [SDR 99FDEA00175](https://openairdocs.org/sdr/99FDEA00175), May 12, 1999: OVERHEAT LIGHT. MALFUNCTIONED. LOWER AFT BODY O/H LIGHT ON. LIGHT WENT OUT WHEN NR 1 BLD AND LT PACK TURN OFF. INSP DUCT IN AFT AIR STAIRS, CEILING, KEEL BEAM AREA AND NO LEAKS FOUND. COULD N
- [SDR TC8A99016](https://openairdocs.org/sdr/TC8A99016), May 6, 1999: CLAMP. LOOSE. KMSP-KMSP TRIP NR 03341. ENG NR 3 STRUT O/H OCCURED IN CLIMB, COMPLIED WITH ENG STRUT O/H CHECKLIST. ENG NR 3 FIRE WARNING LIGHT CAME ON DURING CLIMB, COMPLIED 
- [SDR 99FDEA00105](https://openairdocs.org/sdr/99FDEA00105), Mar 17, 1999: CONNECTOR. FAILED. AFT T/O, NOSE GEAR FAILED TO RETRACT. CYCLED GEAR TWICE, STILL STAYED DOWN. RETURNED TO MEM, NORM GEAR EXTENSION. *S/D* REMOVED AND REPLACED CANNON PLUG D-300, 

All 217: https://openairdocs.org/model/boeing-727-21c/reports.md

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