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|
Attributes | |
ACN | 1461308 |
Time | |
Date | 201706 |
Local Time Of Day | 1801-2400 |
Place | |
Locale Reference | ZZZ.Airport |
State Reference | US |
Environment | |
Light | Dusk |
Aircraft 1 | |
Make Model Name | EMB ERJ 145 ER/LR |
Operating Under FAR Part | Part 121 |
Flight Phase | Initial Approach |
Flight Plan | IFR |
Person 1 | |
Function | Captain Check Pilot |
Qualification | Flight Crew Air Transport Pilot (ATP) |
Events | |
Anomaly | Deviation - Procedural FAR Deviation - Procedural Published Material / Policy Deviation - Speed All Types |
Narrative:
On this particular flight; the acquired landing speeds from our approved takeoff and landing data booklet fell into the white band of the low speed awareness tape. While I don't recall the specific speeds; both vap and vref fell into the aforementioned part of our airspeed tape. After noticing the discrepancy; I referenced speeds for a higher weight category; which gave us speeds that were adequate with reference to the low speed awareness tape. I subsequently referenced our new min field length based on the weight category I chose to get the adjusted speeds. We landed without further event.concern:while not always the case; the speeds that we currently utilize for approach and landing are sometimes out of sync with regard to regulatory compliance and company manuals. To be more specific; the vap and vref speeds are consistently falling into the low speed awareness tape; which raises threats to a level which; is unacceptable given the low-speed characteristics of our swept wing. Before we get specific with our recommendation; my understanding of the issue is based on the following:- vap: per the aom (aircraft operations manual) - the speed at which the approach must be trending towards at 1;000 feet above tdze; and stabilized at no later than 500 feet above tdze. This speed is defined as vref + 5 knots; or vref + wind correction (whichever is greater).- vref: per the aom - the landing speed without any corrections. It is the final landing approach speed with the airplane configured for landing; and the airplane must be stabilized at this speed when crossing the runway threshold at 50 feet.- E-145 low speed awareness tape (white band): 1.23Vs (high end) to 1.13 vs (low end).regulatory highlights:- per far section 25.125 (which part 121 operators must abide by); the following is stated '...in non-icing conditions; vref must be no less than 1.23 Vsr0...' Vsr0 is the reference stall speed in the landing configuration; which; oddly enough; coincides with the top of the white arc on the E145's low speed awareness tape. Said another way; based on these facts; we should never be bugging speeds that fall within any color band on the low speed awareness tape.without reporting this issue; it is my fear that some of our crews will be put in a potentially dangerous situation by flying speeds that are too slow during the approach and landing phase of flight.recommendations:- contact embraer and request clarification regarding best operator practices should acquire landing speeds fall into the low speed awareness tape.- based on embraers recommendation; develop a procedure for flight crews to follow should their acquired speeds not be compliant.- contact other E145 operators to see what approved methods they have for dealing with this type of issue.side notes:- see how the adjusted landing speeds we get from either embraer affect the min field length required.
Original NASA ASRS Text
Title: EMB-145 Captain reported the acquired landing speeds from the approved takeoff and landing data booklet fell into the white band of the low speed awareness tape.
Narrative: On this particular flight; the acquired landing speeds from our approved takeoff and landing data booklet fell into the white band of the low speed awareness tape. While I don't recall the specific speeds; both Vap and Vref fell into the aforementioned part of our airspeed tape. After noticing the discrepancy; I referenced speeds for a higher weight category; which gave us speeds that were adequate with reference to the low speed awareness tape. I subsequently referenced our new MIN FIELD length based on the weight category I chose to get the adjusted speeds. We landed without further event.Concern:While not ALWAYS the case; the speeds that we currently utilize for approach and landing are sometimes out of sync with regard to regulatory compliance and company manuals. To be more specific; the Vap and Vref speeds are consistently falling into the low speed awareness tape; which raises threats to a level which; is unacceptable given the low-speed characteristics of our swept wing. Before we get specific with our recommendation; my understanding of the issue is based on the following:- Vap: Per the AOM (Aircraft Operations Manual) - The speed at which the approach must be trending towards at 1;000 feet above TDZE; and stabilized at no later than 500 feet above TDZE. This speed is defined as Vref + 5 knots; or Vref + wind correction (whichever is greater).- Vref: Per the AOM - The landing speed without any corrections. It is the final landing approach speed with the airplane configured for landing; and the airplane must be stabilized at this speed when crossing the runway threshold at 50 feet.- E-145 low speed awareness tape (white band): 1.23Vs (high end) to 1.13 Vs (low end).Regulatory Highlights:- Per FAR section 25.125 (which part 121 operators must abide by); the following is stated '...In non-icing conditions; Vref must be no less than 1.23 Vsr0...' Vsr0 is the reference stall speed in the landing configuration; which; oddly enough; coincides with the top of the white arc on the E145's low speed awareness tape. Said another way; based on these facts; we should never be bugging speeds that fall within any color band on the low speed awareness tape.Without reporting this issue; it is my fear that some of our crews will be put in a potentially dangerous situation by flying speeds that are too slow during the approach and landing phase of flight.Recommendations:- Contact Embraer and request clarification regarding best operator practices should acquire landing speeds fall into the low speed awareness tape.- Based on Embraers recommendation; develop a procedure for flight crews to follow should their acquired speeds not be compliant.- Contact other E145 operators to see what approved methods they have for dealing with this type of issue.Side notes:- See how the adjusted landing speeds we get from either Embraer affect the MIN FIELD length required.
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.