A C402 on climb out at 7000 ft declared an emergency due to right engine running rough. On final app...

Attributes
ACN	721761
Time
Date	200612
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 7000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : charter
Make Model Name	Small Transport Low Wing 2 Recip Eng
Operating Under FAR Part	Part 135
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : charter
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Experience	flight time last 90 days : 250 flight time total : 2400 flight time type : 200
ASRS Report	721761
Person 2
Affiliation	government : faa
Function	controller : departure
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : fuel press indication other flight crewa
Resolutory Action	other
Consequence	other
Supplementary
Problem Areas	Aircraft Maintenance Human Performance
Primary Problem	Aircraft

Narrative:

On climb out; out of ZZZ; right engine began running rough with corresponding low fuel flow. Pulled mixture back to confirm it was a fuel problem and engine ran worse. Turned right fuel pump to high and engine continued to run. Informed approach I wanted to return to ZZZ. Approach cleared me to ZZZ via radar vectors and asked if I required assistance. I said not yet; but later asked if they could have the fire truck stand by. I then called ZZZ unicom and asked for the truck to stand by and informed crash fire rescue equipment I was having engine trouble. I picked up the airport visually and was cleared for the visual approach. Upon reducing my power the right engine began running very poorly; with corresponding drop in manifold pressure. I kept engine running till I was on final for runway 27L; then as a precaution I shut down the right engine and feathered the right propeller on final approach. Landed safely without incident on left engine. Callback conversation with reporter revealed the following information: the reporter stated the cause of the right engine running rough and the low fuel pressure indication was caused by an engine fuel feed line connector located in the engine nacelle that came loose. The connector was still connected but was very loose and leaked heavily.

Original NASA ASRS Text

Title: A C402 ON CLBOUT AT 7000 FT DECLARED AN EMER DUE TO R ENG RUNNING ROUGH. ON FINAL APCH; SHUT DOWN R ENG. CAUSED BY LOSS OF FUEL PRESSURE DUE TO FUEL LINE LEAK.

Narrative: ON CLBOUT; OUT OF ZZZ; R ENG BEGAN RUNNING ROUGH WITH CORRESPONDING LOW FUEL FLOW. PULLED MIXTURE BACK TO CONFIRM IT WAS A FUEL PROB AND ENG RAN WORSE. TURNED R FUEL PUMP TO HIGH AND ENG CONTINUED TO RUN. INFORMED APCH I WANTED TO RETURN TO ZZZ. APCH CLRED ME TO ZZZ VIA RADAR VECTORS AND ASKED IF I REQUIRED ASSISTANCE. I SAID NOT YET; BUT LATER ASKED IF THEY COULD HAVE THE FIRE TRUCK STAND BY. I THEN CALLED ZZZ UNICOM AND ASKED FOR THE TRUCK TO STAND BY AND INFORMED CFR I WAS HAVING ENG TROUBLE. I PICKED UP THE ARPT VISUALLY AND WAS CLRED FOR THE VISUAL APCH. UPON REDUCING MY PWR THE R ENG BEGAN RUNNING VERY POORLY; WITH CORRESPONDING DROP IN MANIFOLD PRESSURE. I KEPT ENG RUNNING TILL I WAS ON FINAL FOR RWY 27L; THEN AS A PRECAUTION I SHUT DOWN THE R ENG AND FEATHERED THE R PROP ON FINAL APCH. LANDED SAFELY WITHOUT INCIDENT ON L ENG. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE CAUSE OF THE R ENG RUNNING ROUGH AND THE LOW FUEL PRESSURE INDICATION WAS CAUSED BY AN ENG FUEL FEED LINE CONNECTOR LOCATED IN THE ENG NACELLE THAT CAME LOOSE. THE CONNECTOR WAS STILL CONNECTED BUT WAS VERY LOOSE AND LEAKED HEAVILY.

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

A C402 on climb out at 7000 ft declared an emergency due to right engine running rough. On final approach; shut down right engine. Caused by loss of fuel pressure due to fuel line leak.