Medium large transport crew had accumulated ice damage the aircraft landing light cover.

Attributes
ACN	530572
Time
Date	200111
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : swz.ndb
State Reference	TN
Altitude	msl single value : 31000
Aircraft 1
Controlling Facilities	artcc : zjx.artcc
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 18000 flight time type : 3000
ASRS Report	530572
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical non adherence : company policies non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact
Consequence	other other
Supplementary
Problem Areas	Company
Primary Problem	Company

Narrative:

Shortly after descent from altitude, heard and felt mild thump and aircraft movement. No visible problem from cockpit. Upon landing, maintenance found aircraft left landing light cover broken and missing. Fwd water drain valve found open in fwd lav (water drain in drain position). Ice must have broken off and hit glass cover. This was not seen on walk around due to no pressure on water system. Water drain not a normal preflight check from inside. Will be from now on in winter as maintenance drains lines for cold WX operations.

Original NASA ASRS Text

Title: MLG CREW HAD ACCUMULATED ICE DAMAGE THE ACFT LNDG LIGHT COVER.

Narrative: SHORTLY AFTER DSCNT FROM ALT, HEARD AND FELT MILD THUMP AND ACFT MOVEMENT. NO VISIBLE PROB FROM COCKPIT. UPON LANDING, MAINT FOUND ACFT LEFT LNDG LIGHT COVER BROKEN AND MISSING. FWD WATER DRAIN VALVE FOUND OPEN IN FWD LAV (WATER DRAIN IN DRAIN POS). ICE MUST HAVE BROKEN OFF AND HIT GLASS COVER. THIS WAS NOT SEEN ON WALK AROUND DUE TO NO PRESSURE ON WATER SYS. WATER DRAIN NOT A NORMAL PREFLT CHECK FROM INSIDE. WILL BE FROM NOW ON IN WINTER AS MAINT DRAINS LINES FOR COLD WX OPS.

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.