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Pilot of small aircraft on steap rapid rate descent into hayward airport was advised by tower controller he had triggered the MSAW. Pilot considers such a warning counter to safety of flight.
| Attributes | |
| ACN | 114458 |
| Time | |
| Date | 198906 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : hwd |
| State Reference | CA |
| Altitude | msl bound lower : 1500 msl bound upper : 1500 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | tower : hwd |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | descent : approach descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : private pilot : instrument |
| Experience | flight time last 90 days : 93 flight time total : 700 flight time type : 140 |
| ASRS Report | 114458 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : non radar |
| Events | |
| Anomaly | other anomaly other other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : regained aircraft control other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
On an instrument approach to hayward at 1500' MSL I received an 'altitude alert' warning from tower. I was well above the MDA for my location (1140'). I called the tower later (not at their request) and was informed that the computer issues such warnings if the descent rate exceeds a set value (in addition to altitudes below mins). A steep descent is required at hayward and such warnings are counter to safety since one naturally upon receiving such a warning stops the descent, checks, and may not get down in time or may be distracted.
Original NASA ASRS Text
Title: PLT OF SMA ON STEAP RAPID RATE DESCENT INTO HAYWARD ARPT WAS ADVISED BY TWR CTLR HE HAD TRIGGERED THE MSAW. PLT CONSIDERS SUCH A WARNING COUNTER TO SAFETY OF FLT.
Narrative: ON AN INSTRUMENT APCH TO HAYWARD AT 1500' MSL I RECEIVED AN 'ALT ALERT' WARNING FROM TWR. I WAS WELL ABOVE THE MDA FOR MY LOCATION (1140'). I CALLED THE TWR LATER (NOT AT THEIR REQUEST) AND WAS INFORMED THAT THE COMPUTER ISSUES SUCH WARNINGS IF THE DSCNT RATE EXCEEDS A SET VALUE (IN ADDITION TO ALTS BELOW MINS). A STEEP DSCNT IS REQUIRED AT HAYWARD AND SUCH WARNINGS ARE COUNTER TO SAFETY SINCE ONE NATURALLY UPON RECEIVING SUCH A WARNING STOPS THE DSCNT, CHECKS, AND MAY NOT GET DOWN IN TIME OR MAY BE DISTRACTED.
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.