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A challenger 300 crew reported that due to incorrect fuel consumption information they had to divert during a gear down ferry flight.
| Attributes | |
| ACN | 1347885 |
| Time | |
| Date | 201604 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Challenger 300 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Landing |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Inflight Event / Encounter Fuel Issue |
Narrative:
We were doing a gear down ferry. I've never done one before; and finding the relevant information wasn't easy. I spoke with dispatch and he didn't know how to calculate the additional performance necessary with the gear extended. I found the relevant information in the [manual]; but it referenced 'modules' that were not there. I had to go to the QRH to verify that we could meet the climb cruise and landing performance. The one thing I couldn't find was the additional fuel burn; but dispatch said the manual said it was an 8 percent increase. I thought that was low; but got busy and failed to verify it. Turns out the manual says 80 percent increase in fuel burn.approximately 1 hour prior to landing; we noticed the fuel burn was way off; but it still showed that we would land with 2;200lbs. As we got approximately 50 miles south of the border the landing fuel was down to 1;900; and decreasing. We made the decision to divert and landed with just over our emergency fuel. I spoke to dispatch and he said that they will soon have a gear MEL option and this will correct this issue. However; until that happens; I suggest someone that does this more often put together a flowchart with hyperlinks to help crews figure out this critical performance.
Original NASA ASRS Text
Title: A Challenger 300 crew reported that due to incorrect fuel consumption information they had to divert during a gear down ferry flight.
Narrative: We were doing a gear down ferry. I've never done one before; and finding the relevant information wasn't easy. I spoke with dispatch and he didn't know how to calculate the additional performance necessary with the gear extended. I found the relevant information in the [manual]; but it referenced 'modules' that were not there. I had to go to the QRH to verify that we could meet the climb cruise and landing performance. The one thing I couldn't find was the additional fuel burn; but dispatch said the manual said it was an 8 percent increase. I thought that was low; but got busy and failed to verify it. Turns out the manual says 80 percent increase in fuel burn.Approximately 1 hour prior to landing; we noticed the fuel burn was way off; but it still showed that we would land with 2;200lbs. As we got approximately 50 miles south of the border the landing fuel was down to 1;900; and decreasing. We made the decision to divert and landed with just over our emergency fuel. I spoke to dispatch and he said that they will soon have a gear MEL option and this will correct this issue. However; until that happens; I suggest someone that does this more often put together a flowchart with hyperlinks to help crews figure out this critical performance.
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.