20040421014949I

Incident · Minor damage

FAA incident report · Doug MD-90-30 · Salt Lake City, UT · April 21, 2004

Date
April 21, 2004 · 11:33 local
Place
Salt Lake City, UT
Airport
Salt Lake City International
Phase of flight
Normal Cruise
Operating rules
Air carrier (Part 121)
Operator
DALA
Damage
Minor damage
Aircraft
N915DN
Reported as
Doug MD9030
Fatal injuries
0

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry 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.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(-23) Flight crew of of aircraft thought aircraft right hydraulic system became disabled because the hydraulic pressure and quantity indicators (EFIS) read "----". Flight crew shut down right hydraulic system and declared an emergency landing to destination airport slc. They performed manual gear extension and aircraft landed without further incident. Delta airlines maintenance discovered that the right instrument transfer circuit breaker was "tripped." Maintenance reset L9 circuit breaker and performed right hydraulic system functional check. System operated normally. No leaks found. Maintenance discovered that the right stall warning computer would not test. Maintenance removed and replaced right stall warning computer and performed system test. Operational check ok. Injury summary not known by ASI.

As the FAA filed it

(-23) FLIGHT CREW OF OF AIRCRAFT THOUGHT AIRCRAFT RIGHT HYDRAULIC SYSTEM BECAME DISABLED BECAUSE THE HYDRAULIC PRESSURE AND QUANTITY INDICATORS (EFIS) READ "----". FLIGHT CREW SHUT DOWN RIGHT HYDRAULIC SYSTEM AND DECLARED AN EMERGENCY LANDING TO DESTINATION AIRPORT SLC. THEY PERFORMED MANUAL GEAR EXTENSION AND AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. DELTA AIRLINES MAINTENANCE DISCOVERED THAT THE RIGHT INSTRUMENT TRANSFER CIRCUIT BREAKER WAS "TRIPPED." MAINTENANCE RESET L9 CIRCUIT BREAKER AND PERFORMED RIGHT HYDRAULIC SYSTEM FUNCTIONAL CHECK. SYSTEM OPERATED NORMALLY. NO LEAKS FOUND. MAINTENANCE DISCOVERED THAT THE RIGHT STALL WARNING COMPUTER WOULD NOT TEST. MAINTENANCE REMOVED AND REPLACED RIGHT STALL WARNING COMPUTER AND PERFORMED SYSTEM TEST. OPERATIONAL CHECK OK. INJURY SUMMARY NOT KNOWN BY ASI.

Other reports on N915DN · 3

Matched to the same aircraft by N-number and date.