# N573SA: 1978 Dehavilland DHC-6 TWIN OTTER, registration cancelled 2010-11-23 - Type: Cancelled registration (FAA registry, deregistered aircraft) - Cancelled: November 23, 2010 - Exported to: Papua New Guinea - Status when cancelled: Valid registration - Airframe: [Dehavilland DHC-6 TWIN OTTER](https://openairdocs.org/model/dehavilland-dhc-6-twin-otter) (registry code 2802606) - Engine: [Pratt & Whitney PT6A series](https://openairdocs.org/engine/pratt-whitney-pt6a-series) (registry code 52032) - Serial number: 573 - Year built: 1978 - Type of aircraft: Fixed wing multi engine - Engine type: Turbo-prop - Airworthiness: Standard, normal - Airworthiness date: July 9, 2004 - Certificate issued: April 8, 2010 - Last registry action: April 8, 2010 - Mode S code: A75B1F - Owner when cancelled: [Paradise Lending LLC](https://openairdocs.org/faa-owner/PARADISE%20LENDING%20LLC) - Location: [Scottsdale, AZ](https://openairdocs.org/faa-place/AZ/Scottsdale) - Owner type: Corporation - Owner's area on the map: 33.4945° N, 111.9207° W: Placed by OpenAirDocs at the center of ZIP code 85251, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft was based - The mark today: https://openairdocs.org/aircraft/N573SA - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=573SA - Page: https://openairdocs.org/deregistered/N573SA-2010-11-23 From the FAA registry file of November 5, 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 Dehavilland DHC-6 TWIN OTTER: https://openairdocs.org/model/dehavilland-dhc-6-twin-otter.md ## Service difficulty reports (33) Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. - [SDR S9BA2008032](https://openairdocs.org/sdr/S9BA2008032), Nov 8, 2008: GASKET. FAILED. LOST NR 2 OIL PRESSURE AND TORQUE PRESSURE OIL ON ENGINE COWLING AND RIGHT FLOAT. FOUND OIL COOLER RETURN LINE GASKET LEAKING. REMOVED AND REPLACED GASKET, SERV - [SDR S9B2008F00000](https://openairdocs.org/sdr/S9B2008F00000), Jun 9, 2008: FUSE. BURNED. AIR CONDITION CABIN FAN INOPERATIVE ON HIGH, MAKES A BURNING SMELL ON LOW. REPLACED 3 BLOWN FUSES WITH NEW. GROUND OPS CHECK, NO ODORS OR DISCREPANCIES NOTED . - [SDR S9BA2008022](https://openairdocs.org/sdr/S9BA2008022), May 29, 2008: FLOAT. LEAKING. "OPEN" LEFT FLOAT BAY NR 6 LEAKING. REMOVED AND REPLACED FLOAT. WILL UPDATE AFTER FLOAT INSPECTION, EMERGENCY MEASURE EXECUTED NO. AIRCRAFT GROUNDED. FLIGHT NA. - [SDR S9BA2008021](https://openairdocs.org/sdr/S9BA2008021), May 27, 2008: MOUNT. FAILED. RT SPINNER NOTED MISALIGNED. REMOVED AND REPLACED TOP ENGINE MOUNT INSPECTED ALL RIGGING AND WIRING. EMERGENCY MEASURES EXECUTED, RETURNED TO DOCK. AIRCRAFT GRO - [SDR S9BA20080019](https://openairdocs.org/sdr/S9BA20080019), May 19, 2008: LONGERON. CRACKED. RT ENGINE, OB NACELLE LONGERON CRACKED. REPLACED WITH FACTORY NEW PART IAW AC43.13-1B SECTION 4 PARA 4-57 FIG 4-6 AND 4-9. (PN C6W1512-S142) NO EMERGENCY MEASUR - [SDR S9BA200800016](https://openairdocs.org/sdr/S9BA200800016), Apr 10, 2008: ATTACH BRACKET. CORRODED. DURING CAMP INSPECTION, FOUND CORROSION ON LT AFT (SEA FIN) ATTACHMENT BRACKET. REMOVED AND REPLACED SEA FIN ATTACHMENT BRACKET. EMERGENCY DECLARED? NO, AIRCRAF - [SDR S9BA200800017](https://openairdocs.org/sdr/S9BA200800017), Apr 10, 2008: SPAR. CORRODED. DURING CAMP INSPECTION FOUND CORROSION ON LT AFT STABILIZATION SPARE WHERE THE SEA FIN ATTACHMENT BRACKET IS LOCATED. REMOVED AND REPLACED OUTER HORIZONTAL REAR - [SDR S9BA200800014](https://openairdocs.org/sdr/S9BA200800014), Mar 3, 2008: CLEVIS PIN. MISSING. FLT 170, HEARD A POP IN THE AREA OF THE FLYING WIRE. CLEVIS PIN AT LEFT UPPER FLYING WIRE FOUND MISSING UPON LANDING. REMOVED AND REPLACED FLYING WIRES PN 13A02 - [SDR S9BA20080010](https://openairdocs.org/sdr/S9BA20080010), Feb 11, 2008: RIB. CORRODED. CPCP INSP, RT WING FWD RIB AT STA.85 CORRODED. REMOVED AND REPLACED RIB WITH NEW PART IAW AC43-14, CHAPTER 4 PARA 4-57. - [SDR S9BA20080009](https://openairdocs.org/sdr/S9BA20080009), Feb 11, 2008: RIB. CORRODED. CPCP INSPECTION, RT WING FWD RIB AT STA 72.5 CORRODED. REMOVED AND REPLACED RIB WITH NEW PART IAW AC43-14, CHAPTER 4 PARA 4-57. - [SDR S9BA20080006](https://openairdocs.org/sdr/S9BA20080006), Feb 11, 2008: LONGERON. CORRODED. CPCP INSPECTION, LT NACELLE LONGERONS CORRODED. REMOVED AND REPLACED LT AND RT LONGERON IAW SRM 57-30-00 AND AC43-14, CHAPTER 4 PARA 4-57. - [SDR S9BA20080003](https://openairdocs.org/sdr/S9BA20080003), Feb 11, 2008: SKIN. CORRODED. CPCP INSPECTION, LT WING CORRUGATION AT WS 65 TO 125 CORRODED. REPAIRED CORRUGATION BETWEEN WS 65 AND 125 IAW SRM 57-30-00 FIG 4 AND RD6-57-077. EMERGENCY MEASU - [SDR S9BA20080004](https://openairdocs.org/sdr/S9BA20080004), Feb 11, 2008: SKIN. CORRODED. CPCP INSPECTION, LT WING, LT AND RT NACELLE SKINS CORRODED. REMOVED AND REPLACED NACELLE SKINS AND SPLICED SKINS IAW RD6-54-004 AND AC 43-13, PARA 4-57. - [SDR S9BA20080012](https://openairdocs.org/sdr/S9BA20080012), Feb 11, 2008: SKIN. CORRODED. CPCP INSPECTION, RT WING IB FWD SKIN CORRODED WS STA. 35.15 TO 185. REPLACED SKIN IAW SRM CH 57-30-00 FIG 1AND RD 6-57-164. EMERGENCY MEASURES EXECUTED? NO. AIR - [SDR S9BA20080011](https://openairdocs.org/sdr/S9BA20080011), Feb 11, 2008: SKIN. CORRODED. CPCP INSPECTION; RT WING FWD CORRUGATION AT WS 58 CORRODED. REPAIRED CORRUGATION AT WS 58 WITH FACTORY NEW PART IAW SRM 57-30-00 PAGE 4. EMERGENCY MEASURES EXEC - [SDR S9BA20080008](https://openairdocs.org/sdr/S9BA20080008), Feb 11, 2008: MOUNT. CORRODED. CPCP INSP, LT NACELLE OB MOTOR MOUNT CORRODED. REMOVED AND REPLACED ENG MOUNT IAW RD 6-54-006. EMERGENCY MEASURES EXECUTED? NO AIRCRAFT GROUNDED? YES - [SDR S9BA20080005](https://openairdocs.org/sdr/S9BA20080005), Feb 11, 2008: FRAME. CORRODED. CPCP INSPECTION, LT NACELLE HOOPFRAME CORRODED. REMOVED AND REPLACED HOOP FRAME IAW SRM 57-30-00 PAGE 1 AND AC 43-13, PARA 4-57. AC GROUNDED, YES. - [SDR S9BA200800002](https://openairdocs.org/sdr/S9BA200800002), Feb 11, 2008: SPAR. CORRODED. CPCP INSPECTION, FWD LT WING SPAR HAS CORROSION BETWEEN STATIONS 72.5 AND WS 135. REPLACED AND SPLICED FWD SPAR WS 72.5 TO 135 IAW RD6-57-191. AIRCRAFT GROUNDED - [SDR S9BA200800001](https://openairdocs.org/sdr/S9BA200800001), Feb 11, 2008: SKIN. CORRODED. CPCP INSPECTION, LT FWD SKIN ON LT WING IS CORRODED AT WS 63.5. REPLACED LOWER SKIN FROM RIB 1 (STA 35.15) TO RIB 10 (STA 147.5) SPLICED SKIN AT RIB 2 (STA 47.5 - [SDR S9BA200800007](https://openairdocs.org/sdr/S9BA200800007), Feb 11, 2008: SPAR. CORRODED. CPCP INSPECTION, RT WING NOSE SPAR CORRODED WS 35.15 TO WS 135. REPLACED NOSE SPAR WITH FACTORY NEW PART IAW AC43.13-1B CHAP 4 PARA 4-57. EMERGENCY MEASURES EXE - [SDR S9BA200700021](https://openairdocs.org/sdr/S9BA200700021), Oct 16, 2007: SKIN. CORRODED. RT TRAILING FLAP SKIN CORRODED AT ATTACHMENT HINGE FITTING. REMOVED AND REPLACED RT TRAILING FLAP. - [SDR S9BA200700022](https://openairdocs.org/sdr/S9BA200700022), Oct 16, 2007: SKIN. CORRODED. RT WING BOTTOM SKIN CORRODED AT BOTTOM IB WING ROOT STATION 47.5. REMOVED AND REPLACED BOTTOM SKIN IB WING ROOT FROM RIB 2 TO RIB 1 IAW RD6-57-164. - [SDR S9BA200700017](https://openairdocs.org/sdr/S9BA200700017), Sep 24, 2007: RELAY. BURNED. SMOKE ODOR IN CABIN. FOUND A/C RELAY BURNED UP. DEFERRED AIR CONDITIONING IAW MEL 21-1 WILL PROVIDE SUPPLEMENTAL INFORMATION WHEN GENERATED. REMOVED AND REPLACE - [SDR S9BA200700016](https://openairdocs.org/sdr/S9BA200700016), Sep 17, 2007: ATTACH BRACKET. CORRODED. RUDDER MID HINGE ATTACHMENT BRACKET CORRODED. REMOVED AND REPLACED RUDDER MID HINGE ATTACHMENT BRACKET. - [SDR S9BA200700015](https://openairdocs.org/sdr/S9BA200700015), Sep 17, 2007: SPAR. CORRODED. CORROSION FOUND ON FORWARD SPAR OF HORIZONTAL STABILIZER AT SEA FIN MOUNT. (STATION 92) REMOVED AND REPLACED HORIZONTAL STABILIZER. - [SDR S9BA1307](https://openairdocs.org/sdr/S9BA1307), Jul 24, 2007: HINGE FITTING. CORRODED. OB HINGE ARM ON RT FLAP CORRODED, REMOVED AND REPLACED HINGE ARM. - [SDR S9BA1207](https://openairdocs.org/sdr/S9BA1207), Jul 24, 2007: HINGE FITTING. CORRODED. RT FWD FLAP IB HINGE ARM HAS CORROSION ON IT. REMOVED AND REPLACED HINGE ARM. - [SDR S9BA1107](https://openairdocs.org/sdr/S9BA1107), Jul 10, 2007: WASHER. WORN. AFTER COMMENCING DESCENT, FUSELAGE VIBRATION FELT PRIMARILY ON LT SIDE OF AIRCRAFT AT 185 KNOTS. FOUND PLAY IN THE IB FLAP FUSELAGE MOUNTING POINT. REPLACED SPE - [SDR S9BA0507](https://openairdocs.org/sdr/S9BA0507), May 6, 2007: HINGE. CORRODED. RUDDER MID HINGE PLATE AND BEARING ASSY CORRODED - [SDR S9BA00906](https://openairdocs.org/sdr/S9BA00906), Nov 6, 2006: HINGE. CORRODED. DURING INSPECTION, FOUND LT IB FORE FLAP IB HINGE (PN 6WFM1109-33) WITH ATTACHED RIB CORRODED. - [SDR S9BA00806](https://openairdocs.org/sdr/S9BA00806), Nov 6, 2006: HINGE. CORRODED. DURING INSPECTION, FOUND LT IB FORE FLAP OB HINGE (PN C6WF1101045) CORRODED. - [SDR S9BA01006](https://openairdocs.org/sdr/S9BA01006), Oct 17, 2006: BUSHING. WORN. AT 123 KNOTS FELT OSCILLATION, OBSERVED LT WING BOUNCING UP AND DOWN. FOUND LT (V) STRUT BUSHING WORN. SEE WORK PACKAGE 10/17/06 TO 11/07/06. RELEASED AIRCRAFT - [SDR S9BA00206](https://openairdocs.org/sdr/S9BA00206), Sep 25, 2006: BOLT. WORN. AT 150 KNOTS, NOTICED INCREASING STRUCTURAL VIBRATION. OBSERVED LT WING SHAKING. THIS AIRCRAFT WAS INSPECTED AND FOUND SAFE FOR SPECIAL FLIGHT FROM SPB (SST) TO ## Other aircraft with N573SA - [Registered now](https://openairdocs.org/aircraft/N573SA): Cirrus Design SR20, S/N 9923, built 2024 --- 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.