Instructor with spi on stage check, hears an unusual thump on landing and executes a go around. Seeing a dent in the flap and with no control problems, they return to home field where tower indicates a missing right main tire. Emergency landing performed.

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Attributes
ACN	392455
Time
Date	199801
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : 70n
State Reference	PA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior
Operating Under FAR Part	Part 91
Flight Phase	landing other
Flight Plan	None
Person 1
Affiliation	Other
Function	instruction : instructor
Qualification	pilot : commercial pilot : instrument pilot : cfi
Experience	flight time last 90 days : 125 flight time total : 2900 flight time type : 600
ASRS Report	392455
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : student
Experience	flight time last 90 days : 12 flight time total : 35 flight time type : 35
ASRS Report	392454
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other controllera other flight crewa other other : unspecified
Resolutory Action	flight crew : declared emergency none taken : unable other
Consequence	other
Supplementary
Primary Problem	Aircraft

Narrative:

While conducting a flight school stage check, I diverted the student to the springhill airport (70N) where, after the student located the airport at 3500 ft (1800 ft AGL) approximately 1-2 mi east of the airport, I initiated a simulated engine failure. The student circled the airport to land on runway 23. Upon landing, a loud unusual thump was heard and the student initiated a go around which I backed up and supported. On climb out I noticed a dent in the flap which I felt was an indication of further damage. Since the aircraft was flying ok and no control problems were encountered. I elected to continue the short distance to avp where I could have the tower visually check for possible damage and emergency equipment would be available. (No brake pressure and the damage to the flap led me to believe there was gear damage.) upon visual inspection by tower and company personnel it was confirmed that the right main tire was missing. An emergency was declared and an emergency landing was made on runway 28 at avp as wind was approximately 270 degrees at 7 KTS and to prevent obstruction of runway 4. The landing was made without further incident.

Original NASA ASRS Text

Title: INSTRUCTOR WITH SPI ON STAGE CHK, HEARS AN UNUSUAL THUMP ON LNDG AND EXECUTES A GAR. SEEING A DENT IN THE FLAP AND WITH NO CTL PROBS, THEY RETURN TO HOME FIELD WHERE TWR INDICATES A MISSING R MAIN TIRE. EMER LNDG PERFORMED.

Narrative: WHILE CONDUCTING A FLT SCHOOL STAGE CHK, I DIVERTED THE STUDENT TO THE SPRINGHILL ARPT (70N) WHERE, AFTER THE STUDENT LOCATED THE ARPT AT 3500 FT (1800 FT AGL) APPROX 1-2 MI E OF THE ARPT, I INITIATED A SIMULATED ENG FAILURE. THE STUDENT CIRCLED THE ARPT TO LAND ON RWY 23. UPON LNDG, A LOUD UNUSUAL THUMP WAS HEARD AND THE STUDENT INITIATED A GAR WHICH I BACKED UP AND SUPPORTED. ON CLBOUT I NOTICED A DENT IN THE FLAP WHICH I FELT WAS AN INDICATION OF FURTHER DAMAGE. SINCE THE ACFT WAS FLYING OK AND NO CTL PROBS WERE ENCOUNTERED. I ELECTED TO CONTINUE THE SHORT DISTANCE TO AVP WHERE I COULD HAVE THE TWR VISUALLY CHK FOR POSSIBLE DAMAGE AND EMER EQUIP WOULD BE AVAILABLE. (NO BRAKE PRESSURE AND THE DAMAGE TO THE FLAP LED ME TO BELIEVE THERE WAS GEAR DAMAGE.) UPON VISUAL INSPECTION BY TWR AND COMPANY PERSONNEL IT WAS CONFIRMED THAT THE R MAIN TIRE WAS MISSING. AN EMER WAS DECLARED AND AN EMER LNDG WAS MADE ON RWY 28 AT AVP AS WIND WAS APPROX 270 DEGS AT 7 KTS AND TO PREVENT OBSTRUCTION OF RWY 4. THE LNDG WAS MADE WITHOUT FURTHER INCIDENT.

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.