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A B737-300 pilot comments on a disparity between the pdx 11-5 and the pdx 13-1 020 degree - 290 degree quadrant MSA restrictions: 5300 ft versus 4600 ft.
| Attributes | |
| ACN | 701033 |
| Time | |
| Date | 200606 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : pdx.airport |
| State Reference | OR |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 200 flight time total : 15000 flight time type : 4000 |
| ASRS Report | 701033 |
| Events | |
| Anomaly | cabin event other other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : unable |
| Supplementary | |
| Problem Areas | Chart Or Publication |
| Primary Problem | Chart Or Publication |
| Situations | |
| Chart | approach : pdx 13-1 approach : pdx 11-5 |
Narrative:
This report concerns the commercial approach plates for pdx -- no incident or accident occurred. Look at the MSA's for pdx 11-5 and 13-1. They are based on the same NAVAID and use the same radials to divide the sectors. Yet 11-5 shows the south sector MSA as 5300 ft; while the 13-1 page shows it as 4600 ft. So which is it? If; in fact; there is a recently constructed 4300 ft obstacle to the south of the VOR; then the MSA published on the 13-1 page is dangerously low.
Original NASA ASRS Text
Title: A B737-300 PLT COMMENTS ON A DISPARITY BTWN THE PDX 11-5 AND THE PDX 13-1 020 DEG - 290 DEG QUADRANT MSA RESTRICTIONS: 5300 FT VERSUS 4600 FT.
Narrative: THIS RPT CONCERNS THE COMMERCIAL APCH PLATES FOR PDX -- NO INCIDENT OR ACCIDENT OCCURRED. LOOK AT THE MSA'S FOR PDX 11-5 AND 13-1. THEY ARE BASED ON THE SAME NAVAID AND USE THE SAME RADIALS TO DIVIDE THE SECTORS. YET 11-5 SHOWS THE S SECTOR MSA AS 5300 FT; WHILE THE 13-1 PAGE SHOWS IT AS 4600 FT. SO WHICH IS IT? IF; IN FACT; THERE IS A RECENTLY CONSTRUCTED 4300 FT OBSTACLE TO THE S OF THE VOR; THEN THE MSA PUBLISHED ON THE 13-1 PAGE IS DANGEROUSLY LOW.
Data retrieved from NASA's ASRS site as of January 2009 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.