B737-800 returns to departure airport due to standby hydraulic light illuminated.

Attributes
ACN	777635
Time
Date	200803
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 36000
Aircraft 1
Controlling Facilities	artcc : zzz.artcc tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	777635
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : stdby htd warning light
Resolutory Action	flight crew : declared emergency other
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

Standby hydraulic light on during flight. Conference with dispatch and maintenance agreed to return to base. Emergency subsequently declared; landing uneventful.

Original NASA ASRS Text

Title: B737-800 RETURNS TO DEP ARPT DUE TO STANDBY HYDRAULIC LIGHT ILLUMINATED.

Narrative: STANDBY HYD LIGHT ON DURING FLT. CONFERENCE WITH DISPATCH AND MAINT AGREED TO RETURN TO BASE. EMER SUBSEQUENTLY DECLARED; LNDG UNEVENTFUL.

Data retrieved from NASA's ASRS site as of May 2009 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.