# Service difficulty reports: N623DH, cancelled Mar 22, 2000 A list on [N623DH, cancelled Mar 22, 2000](https://openairdocs.org/deregistered/N623DH-2000-03-22.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. - [SDR MZZA98186](https://openairdocs.org/sdr/MZZA98186.md): Accessory Unit · failed · Jul 20, 1998 · N623DH · Boeing 727264 · Landing Gear Retraction/Extension System > FLT 891 - MNL - AFTER TAKEOFF GEAR LEVER WOULD NOT RETRACT. GEAR HANDLE WOULD NOT PASS OFF POSITION. DUMP FUEL AND RETURN TO MNL. MAINTENANCE T/S SYSTEM FOUND L/G ACCESSORY UNIT AT FAULT. REMOVED AND REPLACED L/G ACCESSORY UNIT AND PERFORMED OPS CHECKED PE - [SDR MZZA98101](https://openairdocs.org/sdr/MZZA98101.md): Control Cable · misinstalled · Mar 2, 1998 · N623DH · Boeing 727264 · Aileron Control System > KUL - RT AILERON BODY CABLE SYSTEM, AFT QUADRANT ABOVE RT WHEEL WELL FOUND TO HAVE CABLES INSTALLED ON WRONG GROOVES IAW MM 27-61-11, PARA 71 PLS NOTE THAT RETAINERS STILL HAD ORIGINAL BOEING TAMPER PROOF SEALANT. CABLES SWAPPED IN GROOVES IAW MM 27-62-11, BO - [SDR MZZA98103](https://openairdocs.org/sdr/MZZA98103.md): Mounting Box · cracked · Feb 23, 1998 · N623DH · Boeing 727264 · Leading Edge Slat Actuator > KUL - CRACK ON NR 2 KRUEGER FLAP ACTUATOR MOUNTING BOX ON LOWER OUTBOARD SIDE. LEFT WING NR 2 LE FLAP ACTUATOR MOUNTING BOX OUTBOARD WEB FABRICATED IAW 727 DWG 65-16275. ALODINED AND PRIMED IAW MM 51-20-2. REMOVED AND INSTALLED WITH NEW WEB IAW SRM 51-30-2. - [SDR MZZA98097](https://openairdocs.org/sdr/MZZA98097.md): Spring · broken · Feb 23, 1998 · N623DH · Boeing 727264 · Trailing Edge Flap Control System > KUL - RIGHT INBOARD FOREFLAP INBOARD SEQUENCE CARRIAGE TOGGLE DETENT SPRING BROKEN. SPRING REPLACED IAW MM 27-51-4. FUNCTIONAL CHECK CUTOUT SATISFACTORY. (M) - [SDR MZZA98098](https://openairdocs.org/sdr/MZZA98098.md): Bushing · corroded · Feb 21, 1998 · N623DH · Boeing 727264 · Main Landing Gear Attach Section > KUL - LEFT MLG AFT RUNNION BUSHING FOUND, HAS SIGN OF CORROSION. LEFT MLG AFT TRUNNION BUSHING REPLACED IAW SRM 20-50-03. (M) - [SDR MZZA98102](https://openairdocs.org/sdr/MZZA98102.md): Drum · cracked · Feb 20, 1998 · N623DH · Boeing 727264 · Aileron Control System > KUL - LOST MOTION DEVICE UPPR CABLE DRUM FOUND CRACKED AT CABLE RETAINER SLOT. DRUM REPLACED IN LOST MOTION DEVICE IAW OHM 27-10-03. (M) - [SDR MZZA98108](https://openairdocs.org/sdr/MZZA98108.md): Sill · corroded · Feb 19, 1998 · N623DH · Boeing 727264 · Fuselage Miscellaneous Structure > KUL - AFT CARGO DOOR LOWER SILL T-CHORD BADLY CORRODED ON PREVIOUS BLENDED OUT AREAS. REPAIR CARRYOUT PER ECRA EC 5310-02509. (M) - [SDR MZZA98105](https://openairdocs.org/sdr/MZZA98105.md): Web · failed · Feb 19, 1998 · N623DH · Boeing 727264 · Fuselage Miscellaneous Structure > KUL - WEB BUCKLED BETWEEN STA 28L AND 28R AT FS 620 FWD CARGO. FABRICATED REPAIR DOUBLER AND INSTALLED IAW SRM 51-40-3 FIG 1. (M) - [SDR MZZA98100](https://openairdocs.org/sdr/MZZA98100.md): Stringer · cracked · Feb 18, 1998 · N623DH · Boeing 727264 · Wing, Longeron/Stringer > KUL - CRACK AT 'Z' SECTION AT WS 686.5 AT AFT OF VENT BOX, MOUNTING POINT BETWEEN 'Z' SECTION AND WEB LEFT WING. FABRICATED EXTRUSION IAW EA 5762-01050. ALODINED AND PRIME IAW 51-20-2. INSTALLED EXTRUSION IAW EA 5762-01050. (M) - [SDR MZZA98099](https://openairdocs.org/sdr/MZZA98099.md): Stringer · cracked · Feb 18, 1998 · N623DH · Boeing 727264 · Wing, Longeron/Stringer > KUL - CRACK AT 'Z' SECTION AT WS 656.5 AT AFT OF VENT BOX, MOUNTING POINT BETWEEN 'Z' SECTION AND WEB LT WING. FABRICATED EXTRUSION IAW EA 5762-01050. ALODINED AND PRIME IAW 51-20-2. INSTALLED EXTRUSION IAW EA 5762-01050. (M) - [SDR MZZA98096](https://openairdocs.org/sdr/MZZA98096.md): Gasket · missing · Feb 18, 1998 · N623DH · Boeing 727264 · Fuel Storage > KUL - ALL LEFT AND RT NON STRESSED WING FUEL TANK PANELS FOUND WITH MISSING KNITTED BONDING GASKETS, FOLLOWING PANEL REMOVAL. NEW KNITTED GASKETS INSTALLED IAW MM 28-11-21. (M) - [SDR MZZA98111](https://openairdocs.org/sdr/MZZA98111.md): Sill · corroded · Feb 17, 1998 · N623DH · Boeing 727264 · Fuselage Miscellaneous Structure > KUL - AFT CARGO SILL FWD CORNER AREA BADLY CORRODED. WEB REPAIR CARRYOUT PER SRM 53-10-1. (M) - [SDR MZZA98104](https://openairdocs.org/sdr/MZZA98104.md): Rib · cracked · Feb 17, 1998 · N623DH · Boeing 727264 · Leading Edge Devices > KUL - NR 6 SLAT HAS CRACKING IN THE FOLLOWING PLACES UPPER SKIN AT OUTBOARD HOOK AFT FASTENER HOLE (2 CRACKS), EYE END ATTACH INBOARD RIB AT UPPER FWD CORNER AND LOWER AFT CORNER. REPAIR CARRIED OUT TO THE UPPER SKIN OF OUTBOARD HOOK AS PER SRM 57-50-3. REPL - [SDR MZZA98095](https://openairdocs.org/sdr/MZZA98095.md): Angle · cracked · Feb 17, 1998 · N623DH · Boeing 727264 · Wing Miscellaneous Structure > KUL - NR 6 KRUEGER LEADING EDGE FLAP ACTUATOR TRUNNION MOUNTING BOX STRUCTURE FOUND CRACKED AT INBOARD LOWER AND OUTBOARD UPPER CORNERS. INBOARD AND OUTBOARD ANGLES FABRICATED IAW BOEING DRAWING 65-16275 AND INSTALLED IAW SRM 51-30-2. ACTUATOR REINSTALLED AN - [SDR MZZA98110](https://openairdocs.org/sdr/MZZA98110.md): Beam · corroded · Feb 15, 1998 · N623DH · Boeing 727264 · Horizontal Stabilizer Structure > KUL - LEFT HORIZONTAL STAB TRAILING EDGE UPPER BEAM IS CORRODED EXFOLIATED AT FWD H/CHANNEL. CORROSION REMOVED IAW SRM 51-10-6 FOUND OUT OF LIMITS SRM 51-10-1 PAGE 1 FLANGE THICKNESS LIMIT. LEFT H/STAB, TRAILING EDGE UPPER REPLACED, NEW ROWS OF RIVET INSTALL - [SDR MZZA97262](https://openairdocs.org/sdr/MZZA97262.md): Mounting Plate · leak · Sep 30, 1997 · N623DH · Boeing 727264 · Rudder Control System > MANILA - FLT 0875 - LOG PAGE 7967654 - ON APPROACH INTO MANILA, CREW NOTICED A-HYDRAULIC SYSTEM DROPPED TO 1-3/4 GALLONS. CREW THEN FOLLOWED ABNORMAL PROCEDURES AND LANDED WITH NO ABNORMALITIES. MAINTENANCE FOUND FLUID LOSS DUE TO LEAKAGE AT LOWER RUDDER PCU - [SDR MZZA97129](https://openairdocs.org/sdr/MZZA97129.md): Skin · delaminated · Jul 5, 1997 · N623DH · Boeing 727264 · Wing, Plate/Skin > KUL - S-CHECK. NRC: 862670 - UPPER WING SKIN PANEL AROUND APU EXHAUST DELAMINATED. NEW PANEL FABRICATED IAW ECRA 5720-01380. (X) - [SDR MZZA97103](https://openairdocs.org/sdr/MZZA97103.md): Sequence Valve · failed · May 26, 1997 · N623DH · Boeing 727264 · Landing Gear Door Retract Section > SEL - FLT 875 - MAIN GEAR DOOR LIGHTS CAME ON AND DOORS OPENED WHEN GEAR HANDLE PUT IN OFF POSITION, AFTER TAKEOFF. RECYCLED GEAR HANDLE AND ONLY MLG'S LOWERED AND MLG DOORS STAYED OPEN. PUT GEAR DOWN AND AIR RETURNED BACK TO SEL. TROUBLESHOT SYSTEM PER 32- - [SDR MZZA97140](https://openairdocs.org/sdr/MZZA97140.md): Support · cracked · May 11, 1997 · N623DH · Boeing 727264 · Spoilers > KUL - NR 3 SPOILER OUTBOARD DOWN STOP SUPPORT IS CRACKED AT THE INBOARD STOP AREA. REPLACED INBOARD FLAP TO SPOILER DOWN STOP SUPPORT IAW MM 27-61-5. (X) - [SDR MZZA97139](https://openairdocs.org/sdr/MZZA97139.md): Panel · delaminated · May 10, 1997 · N623DH · Boeing 727264 · Spoilers > KUL - REMOVED NR 2 FLIGHT SPOILER FOR DELAMINATED AREA AT LOWER SIDE FORWARD OF ACTIVATOR ATTACHMENT APPROXIMATELY 6 INCHES WIDE. REPAIRED AREA OF DELAMINATED AREA PER SRM 51-40-6. (X) - [SDR MZZA97138](https://openairdocs.org/sdr/MZZA97138.md): Skin · delaminated · May 10, 1997 · N623DH · Boeing 727264 · Spoilers > KUL - NR 5 SPOILER DELAMINATED LOWER OUTBOARD EDGE 20 INCHES LONG AREA. NR 5 SPOILER DELAMINATED AREA REPAIRED IAW SRM 51-40-6. (X) - [SDR MZZA97137](https://openairdocs.org/sdr/MZZA97137.md): Spoiler · delaminated · May 10, 1997 · N623DH · Boeing 727264 · Spoilers > KUL - S-CHECK. NRC: 861764 - RIGHT WING NR 9 SPOILER PANEL DELAMINATED ON INBOARD END. REPAIRED NR 9 SPOILER DELAMINATION PER SRM 51-60-06. (X) - [SDR MZZA97136](https://openairdocs.org/sdr/MZZA97136.md): Foreflap · delaminated · May 8, 1997 · N623DH · Boeing 727264 · Trailing Edge Flaps > KUL - S-CHECK. NCR: 861652 - BONDING INSPECTION FOUND DELAMINATION APPROXIMATELY 67 INCHES AT LT T/E INBOARD FOREFLAP. REF: N.D.T.R. NR FAA 102509 FOR DETAIL LOCATION. FOREFLAP REMOVED AND REPAIRED IAW SRM 51-40-6 PARA 2F AND PAINTED PER DWC NR 5100008465 - [SDR MZZA97135](https://openairdocs.org/sdr/MZZA97135.md): Fuel Tank · leaking · May 8, 1997 · N623DH · Boeing 727264 · Fuel Storage > KUL - S-CHECK. NRC: 862142 - FUEL LEAK LEFT WING FORWARD SPAR IN LEADING EDGE FLAP AREA. SEALANT REPLACED IAW MM 28-11-0. LEAK CHECK CUT OUT NIL, LEAKS EVIDENT. (X) - [SDR MZZA97133](https://openairdocs.org/sdr/MZZA97133.md): Skin · dented · May 8, 1997 · N623DH · Boeing 727264 · Emergency Exits > KVI - S-CHECK. NRC: 862392 - LEFT FORWARD EMERGENCY ESCAPE HATCH HAS SKIN DAMAGE AT TOP EDGE APPROXIMATELY 12 INCHES LONG. REPAIR TO DAMAGED AREA CARRIED OUT IAW B727 SRM 52-00-02. UPON INVESTIGATION, FOUND FORWARD LT AND AFT LT HATCHES HAD BEEN PREVIOUSL - [SDR MZZA97131](https://openairdocs.org/sdr/MZZA97131.md): Foreflap · worn · May 8, 1997 · N623DH · Boeing 727264 · Trailing Edge Flaps > KUL - S-CHECK. NRC: 862670 - RIGHT INBOARD FOREFLAP, WEAR MARK AT OUTBOARD END. FOREFLAP REPAIR IAW SRM 57-50-4. (X) - [SDR MZZA97130](https://openairdocs.org/sdr/MZZA97130.md): Foreflap · delaminated · May 8, 1997 · N623DH · Boeing 727264 · Trailing Edge Flaps > KUL - S-CHECK. NRC: 862670 - RIGHT INBOARD FOREFLAP DELAMINATED AT INBOARD CORNER OF TRAILING EDGE AND ALONG OUTER SECTION OF TRAILING EDGE. FOREFLAP REPAIRED PER SRM 57-50-4, FIGURE 4. (X) - [SDR MZZA96065](https://openairdocs.org/sdr/MZZA96065.md): Prox Sensor · failed · Aug 18, 1996 · N623DH · Boeing 727264 · Landing Gear Retraction/Extension System > FLT 876 - MNL - AFTER TAKEOFF, UNABLE TO RAISE THE LANDING GEAR, RETURNED TO MNL. ON TROUBLE SHOOTING CONFIRMED HANDLE WILL NOT GO PAST OFF DURING NORMAL OPERATION. FOUND AIR SENSING SENSOR M831 AT FAULT. REPLACED SAME, OPERATION AND TEST NORMAL. (M) - [SDR MZZA96062](https://openairdocs.org/sdr/MZZA96062.md): Adc · malfunctioned · Aug 9, 1996 · N623DH · Boeing 727264 · Air Data Computer > MNL - FLT 876 - NR 1 AND NR 2 GPS SHOW EXCESSIVE WINDS, 120 AT 215 KNOTS, TAS SHOWS 123 KNOTS AT ALL ATTITUDES. TAS INPUT FAILURE INDICATED ON NR 1 GPS. BOTH GPS UNRELIABLE. RETURNED TO MNL. REPLACED NPU NR 1 AND ADC NR 1 AND NR 2. OPS CHECK PER MM 34-12- - [SDR 96ZZZX4360](https://openairdocs.org/sdr/96ZZZX4360.md): Adc · malfunctioned · Aug 9, 1996 · N623DH · Boeing 727264 · Air Data Computer > MNL - FLT 876 - NR 1 AND NR 2 GPS SHOW EXCESSIVE WINDS, 120 AT 215 KNOTS, TAS SHOWS 123 KNOTS AT ALL ATTITUDES. TAS INPUT FAILURE INDICATED ON NR 1 GPS. BOTH GPS UNRELIABLE. RETURNED TO MNL. REPLACED NPU NR 1 AND ADC NR 1 AND NR 2. OPS CHECK PER MM 34-12- ## 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 = 'N623DH' AND deregistration_id = 'N623DH-2000-03-22' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/deregistered/N623DH-2000-03-22/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.