The phrase "able to fix a" is correct and usable in written English.
You can use it when describing someone's capability or skill in repairing something, typically followed by a noun that specifies what can be fixed.
Example: "She is able to fix a broken computer in no time."
Alternatives: "capable of repairing a" or "skilled at fixing a".
"When you finish this, you will be able to fix a radio," an instructor said one day.
"I hope that we will be able to fix a date this evening for Geneva 2," Reuters reported Fabius saying.
After his Thursday round, Mickelson said he was able to fix a glitch in his setup that improved his ball striking.
Jones chose a route up Nelson's right leg, then on to his right arm, from where he was able to fix a sling round his neck.
At Harrisburg, a technician, who, on being asked whether a worker might not be able to fix a stuck valve inside the radioactive plant, replied, "In theory, he can but in practice he can't".
The agency has aspirations to turn the north-east into Britain's green car training centre as demand rises for mechanics able to fix a new breed of electric vehicles.
Reformers are more likely to be able to fix an organisation if there is a danger that their clients will leave.
But until we are able to fix an international minimum wage, we will not be able to pull workers from the grievous category of "slave labour" the pope placed them in.
You and your husband are so incredibly capable of making this work -- of protecting them -- nothing is going to touch them -- nothing you won't be able to fix with a glass of water, a band-aid -- maybe a quick trip to the ER and we'll be on to the "for better" before we know it.
A biker should be able to fix up a bike himself at anytime.
It is also worth noting that the two preferences were able to fix under a broader set of circumstances when introduced simultaneously vs. successively ��� this replicates the result in Figure 2, where direct selection against preference is weaker when two preferences are at low frequencies (dashed lines) than when one is already at a high frequency (solid lines).
