Engine and propeller damage during taxi. Ramp construction obscured by standing water.

Attributes
ACN	112129
Time
Date	198904
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : nas
State Reference	FO
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	other
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	government other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 180 flight time total : 2200 flight time type : 600
ASRS Report	112129
Person 2
Affiliation	government other
Function	controller : ground
Qualification	controller : non radar
Events
Anomaly	conflict : ground critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other Other
Supplementary
Primary Problem	Airport
Air Traffic Incident	other

Narrative:

Light rain and standing water on majority of ramp area. Pilot began taxi after taxi clearance was given. Standing water is not unusual at NAS. No warnings given of unusually deep standing water. Right propeller struck water while taxiing on designated taxi route. Caused engine shutdown from water ingestion, and substantial propeller and engine damage, from sudden stoppage. 1) problem arose from standing water, no wind and clear water--pilots had not depth perception of water's depth. 2) factors: no ground control warning, lack of depth perception. Standing water is the norm after heavy rainfall, and pilots during a 3 yr period at NAS have never found depth of standing water a problem. No notice of construction to sewer drainage system. 3) discovery, engine shutdown and damage observation. 4) NAS ground operations notified of standing water and the unusual water depth. 5) perceptions: taking the standing water as a usual occurrence and not considering the potential problem. Water clarity and no wind, water on black tarmac--no depth perception. 6) performance: north/a. 7) action: none by NAS officials as of this writing. Engine and propeller replaced.

Original NASA ASRS Text

Title: ENGINE AND PROPELLER DAMAGE DURING TAXI. RAMP CONSTRUCTION OBSCURED BY STANDING WATER.

Narrative: LIGHT RAIN AND STANDING WATER ON MAJORITY OF RAMP AREA. PLT BEGAN TAXI AFTER TAXI CLRNC WAS GIVEN. STANDING WATER IS NOT UNUSUAL AT NAS. NO WARNINGS GIVEN OF UNUSUALLY DEEP STANDING WATER. RIGHT PROP STRUCK WATER WHILE TAXIING ON DESIGNATED TAXI ROUTE. CAUSED ENG SHUTDOWN FROM WATER INGESTION, AND SUBSTANTIAL PROP AND ENG DAMAGE, FROM SUDDEN STOPPAGE. 1) PROB AROSE FROM STANDING WATER, NO WIND AND CLEAR WATER--PLTS HAD NOT DEPTH PERCEPTION OF WATER'S DEPTH. 2) FACTORS: NO GND CTL WARNING, LACK OF DEPTH PERCEPTION. STANDING WATER IS THE NORM AFTER HEAVY RAINFALL, AND PLTS DURING A 3 YR PERIOD AT NAS HAVE NEVER FOUND DEPTH OF STANDING WATER A PROB. NO NOTICE OF CONSTRUCTION TO SEWER DRAINAGE SYS. 3) DISCOVERY, ENG SHUTDOWN AND DAMAGE OBSERVATION. 4) NAS GND OPS NOTIFIED OF STANDING WATER AND THE UNUSUAL WATER DEPTH. 5) PERCEPTIONS: TAKING THE STANDING WATER AS A USUAL OCCURRENCE AND NOT CONSIDERING THE POTENTIAL PROB. WATER CLARITY AND NO WIND, WATER ON BLACK TARMAC--NO DEPTH PERCEPTION. 6) PERFORMANCE: N/A. 7) ACTION: NONE BY NAS OFFICIALS AS OF THIS WRITING. ENG AND PROP REPLACED.

Data retrieved from NASA's ASRS site as of August 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.