A cessna 402C pilot had erroneous indications from his airspeed indicator as well as his vsi and alt...

Attributes
ACN	1275460
Time
Date	201507
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	Cessna 402/402C/B379 Businessliner/Utiliner
Operating Under FAR Part	Part 135
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Pitot-Static System
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Clearance Deviation - Speed All Types Deviation - Track / Heading All Types

Narrative:

On takeoff; I made the standard callouts and at vlof (98) I rotated and the aircraft did not fly. We were too slow. I sped up and took off and as I was climbing out the airspeed was varying between 120 and 140. At this time; I noticed the vsi was not indicating and as I climbed the altimeter was unreliable. It was jumping up and down about 200 ft at a time. I was handed off to departure.when I got to departure I requested to return to the field. It was VMC. The controller asked if I need the trucks and I declined. They cleared me for the visual to runway xx and switched to me to tower. Tower cleared me to land on runway xyr. I landed without incident but the airspeed never dropped below 120 until my GPS was showing me going 30 knots.

Original NASA ASRS Text

Title: A Cessna 402C pilot had erroneous indications from his airspeed indicator as well as his VSI and altimeter just after takeoff. He elected to return to the field and landed without incident.

Narrative: On takeoff; I made the standard callouts and at Vlof (98) I rotated and the aircraft did not fly. We were too slow. I sped up and took off and as I was climbing out the airspeed was varying between 120 and 140. At this time; I noticed the VSI was not indicating and as I climbed the altimeter was unreliable. It was jumping up and down about 200 Ft at a time. I was handed off to departure.When I got to departure I requested to return to the field. It was VMC. The controller asked if I need the trucks and I declined. They cleared me for the visual to Runway XX and switched to me to tower. Tower cleared me to land on Runway XYR. I landed without incident but the airspeed never dropped below 120 until my GPS was showing me going 30 Knots.

Data retrieved from NASA's ASRS site 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 cessna 402C pilot had erroneous indications from his airspeed indicator as well as his vsi and altimeter just after takeoff. He elected to return to the field and landed without incident.