A B737-400 departs sea with a multitude of deferred items. After the flight was en route the aircraft experienced further malfunctions and the captain elected to return to sea.

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Attributes
ACN	429291
Time
Date	199902
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sea.airport
State Reference	WA
Altitude	msl single value : 29000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zse.artcc
Operator	common carrier : air carrier
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Route In Use	enroute airway : j50.airway
Flight Plan	IFR
Aircraft 2
Navigation In Use	other vortac
Flight Phase	cruise : level
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : multi engine
Experience	flight time last 90 days : 250 flight time total : 12950 flight time type : 4750
ASRS Report	429291
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance
Independent Detector	aircraft equipment other aircraft equipment : hsi other flight crewa other flight crewb
Resolutory Action	flight crew : landed as precaution other
Consequence	other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : fault isolation
Supplementary
Problem Areas	Company Flight Crew Human Performance Maintenance Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

Talked into taking aircraft with following MEL's: a) first officer's airspeed bug inoperative, B) first officer's flight director inoperative, C) 1 mach trim inoperative. D) 1 speed trim system inoperative. East) both autoplts inoperative. Then once airborne, had some first officer and captain HSI display abnormalities. After discussion with maintenance control and dispatch flight control, changed our destination back to sea. Returned without incident.

Original NASA ASRS Text

Title: A B737-400 DEPARTS SEA WITH A MULTITUDE OF DEFERRED ITEMS. AFTER THE FLT WAS ENRTE THE ACFT EXPERIENCED FURTHER MALFUNCTIONS AND THE CAPT ELECTED TO RETURN TO SEA.

Narrative: TALKED INTO TAKING ACFT WITH FOLLOWING MEL'S: A) FO'S AIRSPD BUG INOP, B) FO'S FLT DIRECTOR INOP, C) 1 MACH TRIM INOP. D) 1 SPD TRIM SYS INOP. E) BOTH AUTOPLTS INOP. THEN ONCE AIRBORNE, HAD SOME FO AND CAPT HSI DISPLAY ABNORMALITIES. AFTER DISCUSSION WITH MAINT CTL AND DISPATCH FLT CTL, CHANGED OUR DEST BACK TO SEA. RETURNED WITHOUT INCIDENT.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.