# SDR RYNA2009012900002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 29, 2009
- Submitted: February 4, 2009
- Operation: Air carrier
- Aircraft: N932RD
- Make and model: Doug DC-9-82
- Registry model: [Doug DC-9-82](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82) (OpenAirDocs)
- Aircraft serial: 49233
- Aircraft time: 51,954 hours, 33,095 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pump
- Condition: Malfunctioned
- Location: Hyd System
- Stage of operation: LD
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/RYNA2009012900002

## Discrepancy

ON DESCENT WITH TRANSFER PUMP & AUX PUMPS ON AND BOTH HYD PUMPS SET IN HIGH POSITION.  RT HYD PUMP PRESS LOW AT APPROX 2000 PSI (LEFT PRESS NORMAL).  ON FINAL APPROACH GEAR EXTENSION RESULTED IN BOTH MLG DOWN AND LOCKED.  NLG EXTENSION (RED NOSE LIGHT ON & VISUAL NLG IND ROD WAS FLUSH DOWN).  NO NLG EXTENSION.  CREW PERFORMED MANUAL EXTENSION PROCEDURE.  ALL 3 MLG DOWN/LOCKED WITH DOORS OPEN.  ACFT LANDED WITH NO INCIDENT AT HRL.  WITH ALL MLG PINS INSTALLED/SAFETY WIRED.  FERRY FLT WITH COPY DO84.  JACKED ACFT MM 07-11-00 RETRACTION TESTED RT SYS W/TRANSFER PUMP ON & PRESS FLUCTUATES.  TESTED HYD SYS W/RT SYSTEM TRANSFER PUMP OFF, NO FLUCTUATION NOTED.  PURGED HYD SYS OF AIR.  CHECKED PRESSURE & RETURN FILTERS IN BOTH SYS FOR CONTAMINATION.  NO CONTAMINATION NOTED. R/R LT RETURN/PRESSURE/NR 2ENG CASE DRAIN FILTERS MM 32-30-00 & MM 29-10-14.  R/R NR 2ENG EDP MM 29-10-05.  REPLACED HYD TRANSFER PUMP MM 29-10-07.  REPLACED ELECTRIC AUX PUMP MM 29-10-26.  ADJUSTED CABLE GROUND MX & BYPASS LEVER MM 32-31-03.  ACCOMPLISHED BLEEDING OF RESERVOIRS & SERVICING OF HYD MM 12-13-01.  ACCOMPLISHED GEAR RETRACTION TEST SEVERAL CYCLES IAW MM 32-30-00.  OPS CHECKED NORMAL, PRESSURE NORMAL.  ACCOMPLISHED LEAK CHECK OF ALL FILTERS/HYD TRANSFER PUMP/ELECTRIC PUMP/NR 2 EDP IAW MM29-00.  ALL LEAK CHECKS GOOD.  ORDERED TEAR DOWN REPORTS FOR COMPONENTS RELATED TO THIS EVENT FOR QUALITY AND RELIABILITY REVIEW.

---
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.