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Reporter pilot identifies the similarities of the uad NDB (263 KHZ) frequencys. Concern with mistuning NDB frequencys could result in premature descent into high terrain.
| Attributes | |
| ACN | 86363 |
| Time | |
| Date | 198804 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : uad airport : oar |
| State Reference | CA |
| Aircraft 1 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Navigation In Use | other ndb other ndb |
| Flight Phase | descent other landing other |
| Route In Use | approach : circling arrival other |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument |
| ASRS Report | 86363 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | other |
| Situations | |
| Navigational Aid | Unspecified |
Narrative:
I am writing to invite your attention to what appears to me to be a dangerous similarity of frequencys between 2 nondirectional beacons which are only 13 mi apart in the vicinity of salinas, ca. One of the approachs to fritzsche aaf is an NDB-a approach using the fort ord NDB with a frequency of 236 KHZ. The chualar NDB, only 13 mi to the southeast, has a frequency of 263 KHZ. Chualar is in the vicinity of high terrain. A pilot attempting to fly the fritzsche NDB-a approach when mistakenly tuned to the chualar NDB could very well collide with the high terrain.
Original NASA ASRS Text
Title: REPORTER PLT IDENTIFIES THE SIMILARITIES OF THE UAD NDB (263 KHZ) FREQS. CONCERN WITH MISTUNING NDB FREQS COULD RESULT IN PREMATURE DESCENT INTO HIGH TERRAIN.
Narrative: I AM WRITING TO INVITE YOUR ATTN TO WHAT APPEARS TO ME TO BE A DANGEROUS SIMILARITY OF FREQS BTWN 2 NONDIRECTIONAL BEACONS WHICH ARE ONLY 13 MI APART IN THE VICINITY OF SALINAS, CA. ONE OF THE APCHS TO FRITZSCHE AAF IS AN NDB-A APCH USING THE FORT ORD NDB WITH A FREQ OF 236 KHZ. THE CHUALAR NDB, ONLY 13 MI TO THE SE, HAS A FREQ OF 263 KHZ. CHUALAR IS IN THE VICINITY OF HIGH TERRAIN. A PLT ATTEMPTING TO FLY THE FRITZSCHE NDB-A APCH WHEN MISTAKENLY TUNED TO THE CHUALAR NDB COULD VERY WELL COLLIDE WITH THE HIGH TERRAIN.
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.