Near midair collision.

Attributes
ACN	229484
Time
Date	199210
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : myf
State Reference	CA
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : myf
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	VFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
ASRS Report	229484
Person 2
Affiliation	Other
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac non adherence : clearance non adherence : far other anomaly other spatial deviation
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : exited adverse environment other other
Consequence	Other
Miss Distance	horizontal : 200 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On oct xx we were late returning VFR from los angeles to san diego. My small aircraft XXX was #5 for a night landing at montgomery field. On a 3 mi final, the ghostly shadow of a high winged single, transitioning right to left in front of me was outlined by the runway lights. God, I thought someone has just flown through the final approach leg without a clearance. Next, the apparition reappeared even closer moving from left to right. Within seconds, the tower contacted me: 'south- turns to the right approved,' followed by 'small aircraft XXX go around' about 30 seconds later. A bit shaken I made an uneventful landing. Later that day a call to the tower revealed the sequence of events. There were 3 aircraft on final, an small aircraft X, an small aircraft xx, and my XXX. The small aircraft xx wrongly decided that he was too close to the small aircraft X and initiated a series of wide s-turns without approval from the tower! That was the high winged ghost in front of me.

Original NASA ASRS Text

Title: NMAC.

Narrative: ON OCT XX WE WERE LATE RETURNING VFR FROM LOS ANGELES TO SAN DIEGO. MY SMA XXX WAS #5 FOR A NIGHT LNDG AT MONTGOMERY FIELD. ON A 3 MI FINAL, THE GHOSTLY SHADOW OF A HIGH WINGED SINGLE, TRANSITIONING R TO L IN FRONT OF ME WAS OUTLINED BY THE RWY LIGHTS. GOD, I THOUGHT SOMEONE HAS JUST FLOWN THROUGH THE FINAL APCH LEG WITHOUT A CLRNC. NEXT, THE APPARITION REAPPEARED EVEN CLOSER MOVING FROM L TO R. WITHIN SECONDS, THE TWR CONTACTED ME: 'S- TURNS TO THE R APPROVED,' FOLLOWED BY 'SMA XXX GAR' ABOUT 30 SECONDS LATER. A BIT SHAKEN I MADE AN UNEVENTFUL LNDG. LATER THAT DAY A CALL TO THE TWR REVEALED THE SEQUENCE OF EVENTS. THERE WERE 3 ACFT ON FINAL, AN SMA X, AN SMA XX, AND MY XXX. THE SMA XX WRONGLY DECIDED THAT HE WAS TOO CLOSE TO THE SMA X AND INITIATED A SERIES OF WIDE S-TURNS WITHOUT APPROVAL FROM THE TWR! THAT WAS THE HIGH WINGED GHOST IN FRONT OF ME.

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.